Finding the Fourth Proportional to 2,590.40, 3,887.18 and 1,030.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.40 : 3,887.18 = 1,030.12 : x
2. Step 2: Convert to fraction form
   2,590.40/3,887.18 = 1,030.12/x
3. Step 3: Cross multiply
   2,590.40x = 3,887.18 × 1,030.12
4. Step 4: Simplify right side
   2,590.40x = 4,004,261.86
5. Step 5: Solve for x
   x = 4,004,261.86/2,590.40
6. Step 6: Final answer
   x = 1,545.81