Finding the Fourth Proportional to 1,189.32, 1,783.71 and 572.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189.32 : 1,783.71 = 572.71 : x
2. Step 2: Convert to fraction form
   1,189.32/1,783.71 = 572.71/x
3. Step 3: Cross multiply
   1,189.32x = 1,783.71 × 572.71
4. Step 4: Simplify right side
   1,189.32x = 1,021,548.55
5. Step 5: Solve for x
   x = 1,021,548.55/1,189.32
6. Step 6: Final answer
   x = 858.93