Finding the Fourth Proportional to 1,373.16, 1,894.92 and 783.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.16 : 1,894.92 = 783.78 : x
2. Step 2: Convert to fraction form
   1,373.16/1,894.92 = 783.78/x
3. Step 3: Cross multiply
   1,373.16x = 1,894.92 × 783.78
4. Step 4: Simplify right side
   1,373.16x = 1,485,200.40
5. Step 5: Solve for x
   x = 1,485,200.40/1,373.16
6. Step 6: Final answer
   x = 1,081.59