Finding the Fourth Proportional to 1,061.74, 1,591.68 and 574.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.74 : 1,591.68 = 574.24 : x
2. Step 2: Convert to fraction form
   1,061.74/1,591.68 = 574.24/x
3. Step 3: Cross multiply
   1,061.74x = 1,591.68 × 574.24
4. Step 4: Simplify right side
   1,061.74x = 914,006.32
5. Step 5: Solve for x
   x = 914,006.32/1,061.74
6. Step 6: Final answer
   x = 860.86