Finding the Fourth Proportional to 2,385.59, 3,577.65 and 904.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.59 : 3,577.65 = 904.31 : x
2. Step 2: Convert to fraction form
   2,385.59/3,577.65 = 904.31/x
3. Step 3: Cross multiply
   2,385.59x = 3,577.65 × 904.31
4. Step 4: Simplify right side
   2,385.59x = 3,235,286.78
5. Step 5: Solve for x
   x = 3,235,286.78/2,385.59
6. Step 6: Final answer
   x = 1,356.18