Finding the Fourth Proportional to 1,373.31, 1,895.40 and 783.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.31 : 1,895.40 = 783.90 : x
2. Step 2: Convert to fraction form
   1,373.31/1,895.40 = 783.90/x
3. Step 3: Cross multiply
   1,373.31x = 1,895.40 × 783.90
4. Step 4: Simplify right side
   1,373.31x = 1,485,804.06
5. Step 5: Solve for x
   x = 1,485,804.06/1,373.31
6. Step 6: Final answer
   x = 1,081.91