Finding the Third Proportional to 131,245.31 and 287,914.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,245.31 : 287,914.50 = 287,914.50 : x
2. Step 2: Convert to fraction form
   131,245.31/287,914.50 = 287,914.50/x
3. Step 3: Cross multiply
   131,245.31x = 287,914.50 × 287,914.50
4. Step 4: Simplify right side
   131,245.31x = 82,894,759,310.25
5. Step 5: Solve for x
   x = 82,894,759,310.25/131,245.31
6. Step 6: Final answer
   x = 631,601.68