Finding the Fourth Proportional to 1,404.42, 1,938.10 and 783.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.42 : 1,938.10 = 783.42 : x
2. Step 2: Convert to fraction form
   1,404.42/1,938.10 = 783.42/x
3. Step 3: Cross multiply
   1,404.42x = 1,938.10 × 783.42
4. Step 4: Simplify right side
   1,404.42x = 1,518,351.65
5. Step 5: Solve for x
   x = 1,518,351.65/1,404.42
6. Step 6: Final answer
   x = 1,081.12