Finding the Fourth Proportional to 3,552.02, 5,328.67 and 1,086.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,552.02 : 5,328.67 = 1,086.78 : x
2. Step 2: Convert to fraction form
   3,552.02/5,328.67 = 1,086.78/x
3. Step 3: Cross multiply
   3,552.02x = 5,328.67 × 1,086.78
4. Step 4: Simplify right side
   3,552.02x = 5,791,091.98
5. Step 5: Solve for x
   x = 5,791,091.98/3,552.02
6. Step 6: Final answer
   x = 1,630.37