Finding the Fourth Proportional to 1,606.08, 2,213.28 and 1,139.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.08 : 2,213.28 = 1,139.52 : x
2. Step 2: Convert to fraction form
   1,606.08/2,213.28 = 1,139.52/x
3. Step 3: Cross multiply
   1,606.08x = 2,213.28 × 1,139.52
4. Step 4: Simplify right side
   1,606.08x = 2,522,076.83
5. Step 5: Solve for x
   x = 2,522,076.83/1,606.08
6. Step 6: Final answer
   x = 1,570.33