Finding the Fourth Proportional to 1,372.95, 1,894.59 and 783.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.95 : 1,894.59 = 783.47 : x
2. Step 2: Convert to fraction form
   1,372.95/1,894.59 = 783.47/x
3. Step 3: Cross multiply
   1,372.95x = 1,894.59 × 783.47
4. Step 4: Simplify right side
   1,372.95x = 1,484,359.16
5. Step 5: Solve for x
   x = 1,484,359.16/1,372.95
6. Step 6: Final answer
   x = 1,081.15