Finding the Third Proportional to 57,213 and 87,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,213 : 87,520.50 = 87,520.50 : x
2. Step 2: Convert to fraction form
   57,213/87,520.50 = 87,520.50/x
3. Step 3: Cross multiply
   57,213x = 87,520.50 × 87,520.50
4. Step 4: Simplify right side
   57,213x = 7,659,837,920.25
5. Step 5: Solve for x
   x = 7,659,837,920.25/57,213
6. Step 6: Final answer
   x = 133,882.82