Finding the Third Proportional to 69,331 and 109,689.25

Step by Step Solution

1. Step 1: Write the proportion equation
   69,331 : 109,689.25 = 109,689.25 : x
2. Step 2: Convert to fraction form
   69,331/109,689.25 = 109,689.25/x
3. Step 3: Cross multiply
   69,331x = 109,689.25 × 109,689.25
4. Step 4: Simplify right side
   69,331x = 12,031,731,565.56
5. Step 5: Solve for x
   x = 12,031,731,565.56/69,331
6. Step 6: Final answer
   x = 173,540.43