Finding the Third Proportional to 68,890.50 and 156,871.69

Step by Step Solution

1. Step 1: Write the proportion equation
   68,890.50 : 156,871.69 = 156,871.69 : x
2. Step 2: Convert to fraction form
   68,890.50/156,871.69 = 156,871.69/x
3. Step 3: Cross multiply
   68,890.50x = 156,871.69 × 156,871.69
4. Step 4: Simplify right side
   68,890.50x = 24,608,726,339.10
5. Step 5: Solve for x
   x = 24,608,726,339.10/68,890.50
6. Step 6: Final answer
   x = 357,215.09