Finding the Fourth Proportional to 1,612.83, 2,225.89 and 904.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.83 : 2,225.89 = 904.79 : x
2. Step 2: Convert to fraction form
   1,612.83/2,225.89 = 904.79/x
3. Step 3: Cross multiply
   1,612.83x = 2,225.89 × 904.79
4. Step 4: Simplify right side
   1,612.83x = 2,013,963.01
5. Step 5: Solve for x
   x = 2,013,963.01/1,612.83
6. Step 6: Final answer
   x = 1,248.71