Finding the Fourth Proportional to 2,617.28, 3,925.94 and 887.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.28 : 3,925.94 = 887.12 : x
2. Step 2: Convert to fraction form
   2,617.28/3,925.94 = 887.12/x
3. Step 3: Cross multiply
   2,617.28x = 3,925.94 × 887.12
4. Step 4: Simplify right side
   2,617.28x = 3,482,779.89
5. Step 5: Solve for x
   x = 3,482,779.89/2,617.28
6. Step 6: Final answer
   x = 1,330.69