Finding the Fourth Proportional to 1,404.22, 1,937.91 and 783.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.22 : 1,937.91 = 783.22 : x
2. Step 2: Convert to fraction form
   1,404.22/1,937.91 = 783.22/x
3. Step 3: Cross multiply
   1,404.22x = 1,937.91 × 783.22
4. Step 4: Simplify right side
   1,404.22x = 1,517,809.87
5. Step 5: Solve for x
   x = 1,517,809.87/1,404.22
6. Step 6: Final answer
   x = 1,080.89