Finding the Fourth Proportional to 1,372.69, 1,894.31 and 783.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.69 : 1,894.31 = 783.35 : x
2. Step 2: Convert to fraction form
   1,372.69/1,894.31 = 783.35/x
3. Step 3: Cross multiply
   1,372.69x = 1,894.31 × 783.35
4. Step 4: Simplify right side
   1,372.69x = 1,483,907.74
5. Step 5: Solve for x
   x = 1,483,907.74/1,372.69
6. Step 6: Final answer
   x = 1,081.02