Finding the Third Proportional to 31,558 and 68,516

Step by Step Solution

1. Step 1: Write the proportion equation
   31,558 : 68,516 = 68,516 : x
2. Step 2: Convert to fraction form
   31,558/68,516 = 68,516/x
3. Step 3: Cross multiply
   31,558x = 68,516 × 68,516
4. Step 4: Simplify right side
   31,558x = 4,694,442,256
5. Step 5: Solve for x
   x = 4,694,442,256/31,558
6. Step 6: Final answer
   x = 148,756.01