Finding the Third Proportional to 57,987.75 and 89,787.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,987.75 : 89,787.75 = 89,787.75 : x
2. Step 2: Convert to fraction form
   57,987.75/89,787.75 = 89,787.75/x
3. Step 3: Cross multiply
   57,987.75x = 89,787.75 × 89,787.75
4. Step 4: Simplify right side
   57,987.75x = 8,061,840,050.06
5. Step 5: Solve for x
   x = 8,061,840,050.06/57,987.75
6. Step 6: Final answer
   x = 139,026.61