Finding the Third Proportional to 239,490 and 359,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,490 : 359,269.50 = 359,269.50 : x
2. Step 2: Convert to fraction form
   239,490/359,269.50 = 359,269.50/x
3. Step 3: Cross multiply
   239,490x = 359,269.50 × 359,269.50
4. Step 4: Simplify right side
   239,490x = 129,074,573,630.25
5. Step 5: Solve for x
   x = 129,074,573,630.25/239,490
6. Step 6: Final answer
   x = 538,956.00