Finding the Third Proportional to 131,770 and 287,392

Step by Step Solution

1. Step 1: Write the proportion equation
   131,770 : 287,392 = 287,392 : x
2. Step 2: Convert to fraction form
   131,770/287,392 = 287,392/x
3. Step 3: Cross multiply
   131,770x = 287,392 × 287,392
4. Step 4: Simplify right side
   131,770x = 82,594,161,664
5. Step 5: Solve for x
   x = 82,594,161,664/131,770
6. Step 6: Final answer
   x = 626,805.51