Finding the Third Proportional to 57,078.75 and 89,536.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,078.75 : 89,536.50 = 89,536.50 : x
2. Step 2: Convert to fraction form
   57,078.75/89,536.50 = 89,536.50/x
3. Step 3: Cross multiply
   57,078.75x = 89,536.50 × 89,536.50
4. Step 4: Simplify right side
   57,078.75x = 8,016,784,832.25
5. Step 5: Solve for x
   x = 8,016,784,832.25/57,078.75
6. Step 6: Final answer
   x = 140,451.30