Finding the Fourth Proportional to 1,404.28, 1,937.86 and 783.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.28 : 1,937.86 = 783.24 : x
2. Step 2: Convert to fraction form
   1,404.28/1,937.86 = 783.24/x
3. Step 3: Cross multiply
   1,404.28x = 1,937.86 × 783.24
4. Step 4: Simplify right side
   1,404.28x = 1,517,809.47
5. Step 5: Solve for x
   x = 1,517,809.47/1,404.28
6. Step 6: Final answer
   x = 1,080.85