Finding the Fourth Proportional to 1,610.48, 2,222.51 and 1,139.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.48 : 2,222.51 = 1,139.22 : x
2. Step 2: Convert to fraction form
   1,610.48/2,222.51 = 1,139.22/x
3. Step 3: Cross multiply
   1,610.48x = 2,222.51 × 1,139.22
4. Step 4: Simplify right side
   1,610.48x = 2,531,922.15
5. Step 5: Solve for x
   x = 2,531,922.15/1,610.48
6. Step 6: Final answer
   x = 1,572.16