Finding the Fourth Proportional to 1,372.62, 1,894.23 and 783.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.62 : 1,894.23 = 783.12 : x
2. Step 2: Convert to fraction form
   1,372.62/1,894.23 = 783.12/x
3. Step 3: Cross multiply
   1,372.62x = 1,894.23 × 783.12
4. Step 4: Simplify right side
   1,372.62x = 1,483,409.40
5. Step 5: Solve for x
   x = 1,483,409.40/1,372.62
6. Step 6: Final answer
   x = 1,080.71