Finding the Fourth Proportional to 1,061.71, 1,591.84 and 540.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.71 : 1,591.84 = 540.70 : x
2. Step 2: Convert to fraction form
   1,061.71/1,591.84 = 540.70/x
3. Step 3: Cross multiply
   1,061.71x = 1,591.84 × 540.70
4. Step 4: Simplify right side
   1,061.71x = 860,710.52
5. Step 5: Solve for x
   x = 860,710.52/1,061.71
6. Step 6: Final answer
   x = 810.68