Finding the Third Proportional to 155,131.50 and 248,894.25

Step by Step Solution

1. Step 1: Write the proportion equation
   155,131.50 : 248,894.25 = 248,894.25 : x
2. Step 2: Convert to fraction form
   155,131.50/248,894.25 = 248,894.25/x
3. Step 3: Cross multiply
   155,131.50x = 248,894.25 × 248,894.25
4. Step 4: Simplify right side
   155,131.50x = 61,948,347,683.06
5. Step 5: Solve for x
   x = 61,948,347,683.06/155,131.50
6. Step 6: Final answer
   x = 399,327.97