Finding the Fourth Proportional to 1,069.55, 1,601.43 and 555.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.55 : 1,601.43 = 555.47 : x
2. Step 2: Convert to fraction form
   1,069.55/1,601.43 = 555.47/x
3. Step 3: Cross multiply
   1,069.55x = 1,601.43 × 555.47
4. Step 4: Simplify right side
   1,069.55x = 889,546.32
5. Step 5: Solve for x
   x = 889,546.32/1,069.55
6. Step 6: Final answer
   x = 831.70