Finding the Third Proportional to 121,090.50 and 329,418

Step by Step Solution

1. Step 1: Write the proportion equation
   121,090.50 : 329,418 = 329,418 : x
2. Step 2: Convert to fraction form
   121,090.50/329,418 = 329,418/x
3. Step 3: Cross multiply
   121,090.50x = 329,418 × 329,418
4. Step 4: Simplify right side
   121,090.50x = 108,516,218,724
5. Step 5: Solve for x
   x = 108,516,218,724/121,090.50
6. Step 6: Final answer
   x = 896,157.99