Finding the Third Proportional to 57,429 and 89,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,429 : 89,059.50 = 89,059.50 : x
2. Step 2: Convert to fraction form
   57,429/89,059.50 = 89,059.50/x
3. Step 3: Cross multiply
   57,429x = 89,059.50 × 89,059.50
4. Step 4: Simplify right side
   57,429x = 7,931,594,540.25
5. Step 5: Solve for x
   x = 7,931,594,540.25/57,429
6. Step 6: Final answer
   x = 138,111.31