Finding the Third Proportional to 56,872.50 and 89,208.25

Step by Step Solution

1. Step 1: Write the proportion equation
   56,872.50 : 89,208.25 = 89,208.25 : x
2. Step 2: Convert to fraction form
   56,872.50/89,208.25 = 89,208.25/x
3. Step 3: Cross multiply
   56,872.50x = 89,208.25 × 89,208.25
4. Step 4: Simplify right side
   56,872.50x = 7,958,111,868.06
5. Step 5: Solve for x
   x = 7,958,111,868.06/56,872.50
6. Step 6: Final answer
   x = 139,929.00