Finding the Fourth Proportional to 1,861.09, 2,566.09 and 1,542.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.09 : 2,566.09 = 1,542.15 : x
2. Step 2: Convert to fraction form
   1,861.09/2,566.09 = 1,542.15/x
3. Step 3: Cross multiply
   1,861.09x = 2,566.09 × 1,542.15
4. Step 4: Simplify right side
   1,861.09x = 3,957,295.69
5. Step 5: Solve for x
   x = 3,957,295.69/1,861.09
6. Step 6: Final answer
   x = 2,126.33