Finding the Fourth Proportional to 1,878.71, 2,592.63 and 1,039.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.71 : 2,592.63 = 1,039.57 : x
2. Step 2: Convert to fraction form
   1,878.71/2,592.63 = 1,039.57/x
3. Step 3: Cross multiply
   1,878.71x = 2,592.63 × 1,039.57
4. Step 4: Simplify right side
   1,878.71x = 2,695,213.89
5. Step 5: Solve for x
   x = 2,695,213.89/1,878.71
6. Step 6: Final answer
   x = 1,434.61