Finding the Fourth Proportional to 1,404.48, 1,938.24 and 783.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.48 : 1,938.24 = 783.36 : x
2. Step 2: Convert to fraction form
   1,404.48/1,938.24 = 783.36/x
3. Step 3: Cross multiply
   1,404.48x = 1,938.24 × 783.36
4. Step 4: Simplify right side
   1,404.48x = 1,518,339.69
5. Step 5: Solve for x
   x = 1,518,339.69/1,404.48
6. Step 6: Final answer
   x = 1,081.07