Finding the Fourth Proportional to 1,061.55, 1,589.45 and 547.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.55 : 1,589.45 = 547.47 : x
2. Step 2: Convert to fraction form
   1,061.55/1,589.45 = 547.47/x
3. Step 3: Cross multiply
   1,061.55x = 1,589.45 × 547.47
4. Step 4: Simplify right side
   1,061.55x = 870,173.45
5. Step 5: Solve for x
   x = 870,173.45/1,061.55
6. Step 6: Final answer
   x = 819.72