Finding the Third Proportional to 131,490 and 287,532

Step by Step Solution

1. Step 1: Write the proportion equation
   131,490 : 287,532 = 287,532 : x
2. Step 2: Convert to fraction form
   131,490/287,532 = 287,532/x
3. Step 3: Cross multiply
   131,490x = 287,532 × 287,532
4. Step 4: Simplify right side
   131,490x = 82,674,651,024
5. Step 5: Solve for x
   x = 82,674,651,024/131,490
6. Step 6: Final answer
   x = 628,752.38