Finding the Fourth Proportional to 1,111.49, 1,668.25 and 591.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.49 : 1,668.25 = 591.93 : x
2. Step 2: Convert to fraction form
   1,111.49/1,668.25 = 591.93/x
3. Step 3: Cross multiply
   1,111.49x = 1,668.25 × 591.93
4. Step 4: Simplify right side
   1,111.49x = 987,475.92
5. Step 5: Solve for x
   x = 987,475.92/1,111.49
6. Step 6: Final answer
   x = 888.43