Finding the Fourth Proportional to 1,778.77, 2,454.72 and 992.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.77 : 2,454.72 = 992.81 : x
2. Step 2: Convert to fraction form
   1,778.77/2,454.72 = 992.81/x
3. Step 3: Cross multiply
   1,778.77x = 2,454.72 × 992.81
4. Step 4: Simplify right side
   1,778.77x = 2,437,078.56
5. Step 5: Solve for x
   x = 2,437,078.56/1,778.77
6. Step 6: Final answer
   x = 1,370.10