Finding the Fourth Proportional to 1,111.19, 1,668.06 and 527.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.19 : 1,668.06 = 527.31 : x
2. Step 2: Convert to fraction form
   1,111.19/1,668.06 = 527.31/x
3. Step 3: Cross multiply
   1,111.19x = 1,668.06 × 527.31
4. Step 4: Simplify right side
   1,111.19x = 879,584.72
5. Step 5: Solve for x
   x = 879,584.72/1,111.19
6. Step 6: Final answer
   x = 791.57