Finding the Fourth Proportional to 1,139.04, 1,707.12 and 591.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.04 : 1,707.12 = 591.48 : x
2. Step 2: Convert to fraction form
   1,139.04/1,707.12 = 591.48/x
3. Step 3: Cross multiply
   1,139.04x = 1,707.12 × 591.48
4. Step 4: Simplify right side
   1,139.04x = 1,009,727.34
5. Step 5: Solve for x
   x = 1,009,727.34/1,139.04
6. Step 6: Final answer
   x = 886.47