Finding the Third Proportional to 158,400 and 329,905.13

Step by Step Solution

1. Step 1: Write the proportion equation
   158,400 : 329,905.13 = 329,905.13 : x
2. Step 2: Convert to fraction form
   158,400/329,905.13 = 329,905.13/x
3. Step 3: Cross multiply
   158,400x = 329,905.13 × 329,905.13
4. Step 4: Simplify right side
   158,400x = 108,837,391,501.27
5. Step 5: Solve for x
   x = 108,837,391,501.27/158,400
6. Step 6: Final answer
   x = 687,104.74