Finding the Third Proportional to 56,644.31 and 87,130.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,644.31 : 87,130.69 = 87,130.69 : x
2. Step 2: Convert to fraction form
   56,644.31/87,130.69 = 87,130.69/x
3. Step 3: Cross multiply
   56,644.31x = 87,130.69 × 87,130.69
4. Step 4: Simplify right side
   56,644.31x = 7,591,756,704.22
5. Step 5: Solve for x
   x = 7,591,756,704.22/56,644.31
6. Step 6: Final answer
   x = 134,025.05