Finding the Third Proportional to 59,128.73 and 89,308.20

Step by Step Solution

1. Step 1: Write the proportion equation
   59,128.73 : 89,308.20 = 89,308.20 : x
2. Step 2: Convert to fraction form
   59,128.73/89,308.20 = 89,308.20/x
3. Step 3: Cross multiply
   59,128.73x = 89,308.20 × 89,308.20
4. Step 4: Simplify right side
   59,128.73x = 7,975,953,749.98
5. Step 5: Solve for x
   x = 7,975,953,749.98/59,128.73
6. Step 6: Final answer
   x = 134,891.33