Finding the Third Proportional to 72,661.50 and 156,789

Step by Step Solution

1. Step 1: Write the proportion equation
   72,661.50 : 156,789 = 156,789 : x
2. Step 2: Convert to fraction form
   72,661.50/156,789 = 156,789/x
3. Step 3: Cross multiply
   72,661.50x = 156,789 × 156,789
4. Step 4: Simplify right side
   72,661.50x = 24,582,790,521
5. Step 5: Solve for x
   x = 24,582,790,521/72,661.50
6. Step 6: Final answer
   x = 338,319.34