Finding the Fourth Proportional to 2,773.72, 4,159.20 and 924.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.72 : 4,159.20 = 924.20 : x
2. Step 2: Convert to fraction form
   2,773.72/4,159.20 = 924.20/x
3. Step 3: Cross multiply
   2,773.72x = 4,159.20 × 924.20
4. Step 4: Simplify right side
   2,773.72x = 3,843,932.64
5. Step 5: Solve for x
   x = 3,843,932.64/2,773.72
6. Step 6: Final answer
   x = 1,385.84