Finding the Third Proportional to 131,785.50 and 287,421

Step by Step Solution

1. Step 1: Write the proportion equation
   131,785.50 : 287,421 = 287,421 : x
2. Step 2: Convert to fraction form
   131,785.50/287,421 = 287,421/x
3. Step 3: Cross multiply
   131,785.50x = 287,421 × 287,421
4. Step 4: Simplify right side
   131,785.50x = 82,610,831,241
5. Step 5: Solve for x
   x = 82,610,831,241/131,785.50
6. Step 6: Final answer
   x = 626,858.28