Finding the Fourth Proportional to 1,417.28, 2,127.20 and 759.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.28 : 2,127.20 = 759.69 : x
2. Step 2: Convert to fraction form
   1,417.28/2,127.20 = 759.69/x
3. Step 3: Cross multiply
   1,417.28x = 2,127.20 × 759.69
4. Step 4: Simplify right side
   1,417.28x = 1,616,008.77
5. Step 5: Solve for x
   x = 1,616,008.77/1,417.28
6. Step 6: Final answer
   x = 1,140.22