Finding the Third Proportional to 131,440 and 285,024.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,440 : 285,024.50 = 285,024.50 : x
2. Step 2: Convert to fraction form
   131,440/285,024.50 = 285,024.50/x
3. Step 3: Cross multiply
   131,440x = 285,024.50 × 285,024.50
4. Step 4: Simplify right side
   131,440x = 81,238,965,600.25
5. Step 5: Solve for x
   x = 81,238,965,600.25/131,440
6. Step 6: Final answer
   x = 618,068.82