Finding the Fourth Proportional to 1,061.58, 1,591.38 and 574.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.58 : 1,591.38 = 574.68 : x
2. Step 2: Convert to fraction form
   1,061.58/1,591.38 = 574.68/x
3. Step 3: Cross multiply
   1,061.58x = 1,591.38 × 574.68
4. Step 4: Simplify right side
   1,061.58x = 914,534.26
5. Step 5: Solve for x
   x = 914,534.26/1,061.58
6. Step 6: Final answer
   x = 861.48