Finding the Third Proportional to 31,687.88 and 68,893.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,687.88 : 68,893.88 = 68,893.88 : x
2. Step 2: Convert to fraction form
   31,687.88/68,893.88 = 68,893.88/x
3. Step 3: Cross multiply
   31,687.88x = 68,893.88 × 68,893.88
4. Step 4: Simplify right side
   31,687.88x = 4,746,366,012.52
5. Step 5: Solve for x
   x = 4,746,366,012.52/31,687.88
6. Step 6: Final answer
   x = 149,784.93