Finding the Fourth Proportional to 1,878.86, 2,592.81 and 1,039.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.86 : 2,592.81 = 1,039.61 : x
2. Step 2: Convert to fraction form
   1,878.86/2,592.81 = 1,039.61/x
3. Step 3: Cross multiply
   1,878.86x = 2,592.81 × 1,039.61
4. Step 4: Simplify right side
   1,878.86x = 2,695,498.24
5. Step 5: Solve for x
   x = 2,695,498.24/1,878.86
6. Step 6: Final answer
   x = 1,434.65