Finding the Fourth Proportional to 1,657.50, 2,487.47 and 1,081.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,657.50 : 2,487.47 = 1,081.59 : x
2. Step 2: Convert to fraction form
   1,657.50/2,487.47 = 1,081.59/x
3. Step 3: Cross multiply
   1,657.50x = 2,487.47 × 1,081.59
4. Step 4: Simplify right side
   1,657.50x = 2,690,417.27
5. Step 5: Solve for x
   x = 2,690,417.27/1,657.50
6. Step 6: Final answer
   x = 1,623.18