Finding the Fourth Proportional to 1,610.17, 2,223.87 and 1,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.17 : 2,223.87 = 1,139.25 : x
2. Step 2: Convert to fraction form
   1,610.17/2,223.87 = 1,139.25/x
3. Step 3: Cross multiply
   1,610.17x = 2,223.87 × 1,139.25
4. Step 4: Simplify right side
   1,610.17x = 2,533,543.90
5. Step 5: Solve for x
   x = 2,533,543.90/1,610.17
6. Step 6: Final answer
   x = 1,573.46