Finding the Fourth Proportional to 1,606.59, 2,407.90 and 913.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.59 : 2,407.90 = 913.83 : x
2. Step 2: Convert to fraction form
   1,606.59/2,407.90 = 913.83/x
3. Step 3: Cross multiply
   1,606.59x = 2,407.90 × 913.83
4. Step 4: Simplify right side
   1,606.59x = 2,200,411.26
5. Step 5: Solve for x
   x = 2,200,411.26/1,606.59
6. Step 6: Final answer
   x = 1,369.62