Finding the Third Proportional to 152,331 and 243,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,331 : 243,256.50 = 243,256.50 : x
2. Step 2: Convert to fraction form
   152,331/243,256.50 = 243,256.50/x
3. Step 3: Cross multiply
   152,331x = 243,256.50 × 243,256.50
4. Step 4: Simplify right side
   152,331x = 59,173,724,792.25
5. Step 5: Solve for x
   x = 59,173,724,792.25/152,331
6. Step 6: Final answer
   x = 388,454.91