Finding the Third Proportional to 57,781,719.56 and 128,021,959.69

Step by Step Solution

1. Step 1: Write the proportion equation
   57,781,719.56 : 128,021,959.69 = 128,021,959.69 : x
2. Step 2: Convert to fraction form
   57,781,719.56/128,021,959.69 = 128,021,959.69/x
3. Step 3: Cross multiply
   57,781,719.56x = 128,021,959.69 × 128,021,959.69
4. Step 4: Simplify right side
   57,781,719.56x = 16,389,622,162,227,876
5. Step 5: Solve for x
   x = 16,389,622,162,227,876/57,781,719.56
6. Step 6: Final answer
   x = 283,647,186.11