Finding the Fourth Proportional to 1,878.72, 2,592.43 and 1,039.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.72 : 2,592.43 = 1,039.39 : x
2. Step 2: Convert to fraction form
   1,878.72/2,592.43 = 1,039.39/x
3. Step 3: Cross multiply
   1,878.72x = 2,592.43 × 1,039.39
4. Step 4: Simplify right side
   1,878.72x = 2,694,536.74
5. Step 5: Solve for x
   x = 2,694,536.74/1,878.72
6. Step 6: Final answer
   x = 1,434.24