Finding the Third Proportional to 131,356.50 and 288,955.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,356.50 : 288,955.50 = 288,955.50 : x
2. Step 2: Convert to fraction form
   131,356.50/288,955.50 = 288,955.50/x
3. Step 3: Cross multiply
   131,356.50x = 288,955.50 × 288,955.50
4. Step 4: Simplify right side
   131,356.50x = 83,495,280,980.25
5. Step 5: Solve for x
   x = 83,495,280,980.25/131,356.50
6. Step 6: Final answer
   x = 635,638.75