Finding the Fourth Proportional to 1,865.72, 2,574.86 and 1,026.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.72 : 2,574.86 = 1,026.59 : x
2. Step 2: Convert to fraction form
   1,865.72/2,574.86 = 1,026.59/x
3. Step 3: Cross multiply
   1,865.72x = 2,574.86 × 1,026.59
4. Step 4: Simplify right side
   1,865.72x = 2,643,307.52
5. Step 5: Solve for x
   x = 2,643,307.52/1,865.72
6. Step 6: Final answer
   x = 1,416.78