Finding the Third Proportional to 250,915.50 and 551,641.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,915.50 : 551,641.50 = 551,641.50 : x
2. Step 2: Convert to fraction form
   250,915.50/551,641.50 = 551,641.50/x
3. Step 3: Cross multiply
   250,915.50x = 551,641.50 × 551,641.50
4. Step 4: Simplify right side
   250,915.50x = 304,308,344,522.25
5. Step 5: Solve for x
   x = 304,308,344,522.25/250,915.50
6. Step 6: Final answer
   x = 1,212,792.13