Finding the Fourth Proportional to 1,529.72, 2,293.22 and 1,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.72 : 2,293.22 = 1,139.25 : x
2. Step 2: Convert to fraction form
   1,529.72/2,293.22 = 1,139.25/x
3. Step 3: Cross multiply
   1,529.72x = 2,293.22 × 1,139.25
4. Step 4: Simplify right side
   1,529.72x = 2,612,550.89
5. Step 5: Solve for x
   x = 2,612,550.89/1,529.72
6. Step 6: Final answer
   x = 1,707.86