Finding the Fourth Proportional to 2,590.57, 3,887.88 and 948.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.57 : 3,887.88 = 948.16 : x
2. Step 2: Convert to fraction form
   2,590.57/3,887.88 = 948.16/x
3. Step 3: Cross multiply
   2,590.57x = 3,887.88 × 948.16
4. Step 4: Simplify right side
   2,590.57x = 3,686,332.30
5. Step 5: Solve for x
   x = 3,686,332.30/2,590.57
6. Step 6: Final answer
   x = 1,422.98