Finding the Fourth Proportional to 1,778.31, 2,454.17 and 992.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.31 : 2,454.17 = 992.34 : x
2. Step 2: Convert to fraction form
   1,778.31/2,454.17 = 992.34/x
3. Step 3: Cross multiply
   1,778.31x = 2,454.17 × 992.34
4. Step 4: Simplify right side
   1,778.31x = 2,435,366.10
5. Step 5: Solve for x
   x = 2,435,366.10/1,778.31
6. Step 6: Final answer
   x = 1,369.48