Finding the Fourth Proportional to 1,086.80, 1,627.32 and 572.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.80 : 1,627.32 = 572.24 : x
2. Step 2: Convert to fraction form
   1,086.80/1,627.32 = 572.24/x
3. Step 3: Cross multiply
   1,086.80x = 1,627.32 × 572.24
4. Step 4: Simplify right side
   1,086.80x = 931,217.60
5. Step 5: Solve for x
   x = 931,217.60/1,086.80
6. Step 6: Final answer
   x = 856.84