Finding the Third Proportional to 56,563.31 and 87,945.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,563.31 : 87,945.75 = 87,945.75 : x
2. Step 2: Convert to fraction form
   56,563.31/87,945.75 = 87,945.75/x
3. Step 3: Cross multiply
   56,563.31x = 87,945.75 × 87,945.75
4. Step 4: Simplify right side
   56,563.31x = 7,734,454,943.06
5. Step 5: Solve for x
   x = 7,734,454,943.06/56,563.31
6. Step 6: Final answer
   x = 136,739.78