Finding the Fourth Proportional to 1,404.38, 1,938.04 and 783.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.38 : 1,938.04 = 783.50 : x
2. Step 2: Convert to fraction form
   1,404.38/1,938.04 = 783.50/x
3. Step 3: Cross multiply
   1,404.38x = 1,938.04 × 783.50
4. Step 4: Simplify right side
   1,404.38x = 1,518,442.69
5. Step 5: Solve for x
   x = 1,518,442.69/1,404.38
6. Step 6: Final answer
   x = 1,081.22