Finding the Fourth Proportional to 1,139.58, 1,710.44 and 592.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.58 : 1,710.44 = 592.15 : x
2. Step 2: Convert to fraction form
   1,139.58/1,710.44 = 592.15/x
3. Step 3: Cross multiply
   1,139.58x = 1,710.44 × 592.15
4. Step 4: Simplify right side
   1,139.58x = 1,012,837.05
5. Step 5: Solve for x
   x = 1,012,837.05/1,139.58
6. Step 6: Final answer
   x = 888.78