Finding the Third Proportional to 138,864,390.19 and 189,139,780.69

Step by Step Solution

1. Step 1: Write the proportion equation
   138,864,390.19 : 189,139,780.69 = 189,139,780.69 : x
2. Step 2: Convert to fraction form
   138,864,390.19/189,139,780.69 = 189,139,780.69/x
3. Step 3: Cross multiply
   138,864,390.19x = 189,139,780.69 × 189,139,780.69
4. Step 4: Simplify right side
   138,864,390.19x = 35,773,856,638,515,596
5. Step 5: Solve for x
   x = 35,773,856,638,515,596/138,864,390.19
6. Step 6: Final answer
   x = 257,617,209.06