Finding the Fourth Proportional to 1,333.65, 2,002.23 and 1,139.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.65 : 2,002.23 = 1,139.88 : x
2. Step 2: Convert to fraction form
   1,333.65/2,002.23 = 1,139.88/x
3. Step 3: Cross multiply
   1,333.65x = 2,002.23 × 1,139.88
4. Step 4: Simplify right side
   1,333.65x = 2,282,301.93
5. Step 5: Solve for x
   x = 2,282,301.93/1,333.65
6. Step 6: Final answer
   x = 1,711.32