Finding the Third Proportional to 53,572.50 and 86,028.75

Step by Step Solution

1. Step 1: Write the proportion equation
   53,572.50 : 86,028.75 = 86,028.75 : x
2. Step 2: Convert to fraction form
   53,572.50/86,028.75 = 86,028.75/x
3. Step 3: Cross multiply
   53,572.50x = 86,028.75 × 86,028.75
4. Step 4: Simplify right side
   53,572.50x = 7,400,945,826.56
5. Step 5: Solve for x
   x = 7,400,945,826.56/53,572.50
6. Step 6: Final answer
   x = 138,148.23