Finding the Fourth Proportional to 1,520.61, 2,285.18 and 904.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.61 : 2,285.18 = 904.42 : x
2. Step 2: Convert to fraction form
   1,520.61/2,285.18 = 904.42/x
3. Step 3: Cross multiply
   1,520.61x = 2,285.18 × 904.42
4. Step 4: Simplify right side
   1,520.61x = 2,066,762.50
5. Step 5: Solve for x
   x = 2,066,762.50/1,520.61
6. Step 6: Final answer
   x = 1,359.17