Finding the Fourth Proportional to 2,925.09, 4,385.13 and 1,280.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,925.09 : 4,385.13 = 1,280.37 : x
2. Step 2: Convert to fraction form
   2,925.09/4,385.13 = 1,280.37/x
3. Step 3: Cross multiply
   2,925.09x = 4,385.13 × 1,280.37
4. Step 4: Simplify right side
   2,925.09x = 5,614,588.90
5. Step 5: Solve for x
   x = 5,614,588.90/2,925.09
6. Step 6: Final answer
   x = 1,919.46