Finding the Fourth Proportional to 1,188.86, 1,782.56 and 572.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.86 : 1,782.56 = 572.04 : x
2. Step 2: Convert to fraction form
   1,188.86/1,782.56 = 572.04/x
3. Step 3: Cross multiply
   1,188.86x = 1,782.56 × 572.04
4. Step 4: Simplify right side
   1,188.86x = 1,019,695.62
5. Step 5: Solve for x
   x = 1,019,695.62/1,188.86
6. Step 6: Final answer
   x = 857.71