Finding the Third Proportional to 56,130.50 and 87,155.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,130.50 : 87,155.75 = 87,155.75 : x
2. Step 2: Convert to fraction form
   56,130.50/87,155.75 = 87,155.75/x
3. Step 3: Cross multiply
   56,130.50x = 87,155.75 × 87,155.75
4. Step 4: Simplify right side
   56,130.50x = 7,596,124,758.06
5. Step 5: Solve for x
   x = 7,596,124,758.06/56,130.50
6. Step 6: Final answer
   x = 135,329.72