Finding the Fourth Proportional to 3,531.78, 5,298.27 and 1,066.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,531.78 : 5,298.27 = 1,066.32 : x
2. Step 2: Convert to fraction form
   3,531.78/5,298.27 = 1,066.32/x
3. Step 3: Cross multiply
   3,531.78x = 5,298.27 × 1,066.32
4. Step 4: Simplify right side
   3,531.78x = 5,649,651.27
5. Step 5: Solve for x
   x = 5,649,651.27/3,531.78
6. Step 6: Final answer
   x = 1,599.66