Finding the Third Proportional to 57,409 and 87,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,409 : 87,328.50 = 87,328.50 : x
2. Step 2: Convert to fraction form
   57,409/87,328.50 = 87,328.50/x
3. Step 3: Cross multiply
   57,409x = 87,328.50 × 87,328.50
4. Step 4: Simplify right side
   57,409x = 7,626,266,912.25
5. Step 5: Solve for x
   x = 7,626,266,912.25/57,409
6. Step 6: Final answer
   x = 132,840.96