Finding the Fourth Proportional to 5,128,189,499.56, 7,692,045,953.82 and 2,139,018,894.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128,189,499.56 : 7,692,045,953.82 = 2,139,018,894.76 : x
2. Step 2: Convert to fraction form
   5,128,189,499.56/7,692,045,953.82 = 2,139,018,894.76/x
3. Step 3: Cross multiply
   5,128,189,499.56x = 7,692,045,953.82 × 2,139,018,894.76
4. Step 4: Simplify right side
   5,128,189,499.56x = 16,453,431,634,583,185,408
5. Step 5: Solve for x
   x = 16,453,431,634,583,185,408/5,128,189,499.56
6. Step 6: Final answer
   x = 3,208,428,946.71