Finding the Fourth Proportional to 1,877.50, 2,590.89 and 1,038.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.50 : 2,590.89 = 1,038.20 : x
2. Step 2: Convert to fraction form
   1,877.50/2,590.89 = 1,038.20/x
3. Step 3: Cross multiply
   1,877.50x = 2,590.89 × 1,038.20
4. Step 4: Simplify right side
   1,877.50x = 2,689,862.00
5. Step 5: Solve for x
   x = 2,689,862.00/1,877.50
6. Step 6: Final answer
   x = 1,432.68