Finding the Fourth Proportional to 1,061.25, 1,591.07 and 573.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.25 : 1,591.07 = 573.63 : x
2. Step 2: Convert to fraction form
   1,061.25/1,591.07 = 573.63/x
3. Step 3: Cross multiply
   1,061.25x = 1,591.07 × 573.63
4. Step 4: Simplify right side
   1,061.25x = 912,682.62
5. Step 5: Solve for x
   x = 912,682.62/1,061.25
6. Step 6: Final answer
   x = 860.01