Finding the Fourth Proportional to 2,925.18, 4,387.86 and 1,280.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,925.18 : 4,387.86 = 1,280.88 : x
2. Step 2: Convert to fraction form
   2,925.18/4,387.86 = 1,280.88/x
3. Step 3: Cross multiply
   2,925.18x = 4,387.86 × 1,280.88
4. Step 4: Simplify right side
   2,925.18x = 5,620,322.12
5. Step 5: Solve for x
   x = 5,620,322.12/2,925.18
6. Step 6: Final answer
   x = 1,921.36