Finding the Fourth Proportional to 1,877.91, 2,591.50 and 1,038.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.91 : 2,591.50 = 1,038.61 : x
2. Step 2: Convert to fraction form
   1,877.91/2,591.50 = 1,038.61/x
3. Step 3: Cross multiply
   1,877.91x = 2,591.50 × 1,038.61
4. Step 4: Simplify right side
   1,877.91x = 2,691,557.82
5. Step 5: Solve for x
   x = 2,691,557.82/1,877.91
6. Step 6: Final answer
   x = 1,433.27