Finding the Fourth Proportional to 1,139.69, 1,710.21 and 592.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.69 : 1,710.21 = 592.07 : x
2. Step 2: Convert to fraction form
   1,139.69/1,710.21 = 592.07/x
3. Step 3: Cross multiply
   1,139.69x = 1,710.21 × 592.07
4. Step 4: Simplify right side
   1,139.69x = 1,012,555.48
5. Step 5: Solve for x
   x = 1,012,555.48/1,139.69
6. Step 6: Final answer
   x = 888.45