Finding the Fourth Proportional to 1,404.63, 1,938.41 and 783.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.63 : 1,938.41 = 783.63 : x
2. Step 2: Convert to fraction form
   1,404.63/1,938.41 = 783.63/x
3. Step 3: Cross multiply
   1,404.63x = 1,938.41 × 783.63
4. Step 4: Simplify right side
   1,404.63x = 1,518,996.23
5. Step 5: Solve for x
   x = 1,518,996.23/1,404.63
6. Step 6: Final answer
   x = 1,081.42