Finding the Fourth Proportional to 1,065.47, 1,599.16 and 545.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.47 : 1,599.16 = 545.83 : x
2. Step 2: Convert to fraction form
   1,065.47/1,599.16 = 545.83/x
3. Step 3: Cross multiply
   1,065.47x = 1,599.16 × 545.83
4. Step 4: Simplify right side
   1,065.47x = 872,858.78
5. Step 5: Solve for x
   x = 872,858.78/1,065.47
6. Step 6: Final answer
   x = 819.22