Finding the Fourth Proportional to 1,373.03, 1,894.30 and 783.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.03 : 1,894.30 = 783.15 : x
2. Step 2: Convert to fraction form
   1,373.03/1,894.30 = 783.15/x
3. Step 3: Cross multiply
   1,373.03x = 1,894.30 × 783.15
4. Step 4: Simplify right side
   1,373.03x = 1,483,521.05
5. Step 5: Solve for x
   x = 1,483,521.05/1,373.03
6. Step 6: Final answer
   x = 1,080.47