Finding the Third Proportional to 57,467,849.63 and 86,117,499

Step by Step Solution

1. Step 1: Write the proportion equation
   57,467,849.63 : 86,117,499 = 86,117,499 : x
2. Step 2: Convert to fraction form
   57,467,849.63/86,117,499 = 86,117,499/x
3. Step 3: Cross multiply
   57,467,849.63x = 86,117,499 × 86,117,499
4. Step 4: Simplify right side
   57,467,849.63x = 7,416,223,634,015,001
5. Step 5: Solve for x
   x = 7,416,223,634,015,001/57,467,849.63
6. Step 6: Final answer
   x = 129,049,958.93