Finding the Fourth Proportional to 2,515.12, 3,773.52 and 872.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.12 : 3,773.52 = 872.08 : x
2. Step 2: Convert to fraction form
   2,515.12/3,773.52 = 872.08/x
3. Step 3: Cross multiply
   2,515.12x = 3,773.52 × 872.08
4. Step 4: Simplify right side
   2,515.12x = 3,290,811.32
5. Step 5: Solve for x
   x = 3,290,811.32/2,515.12
6. Step 6: Final answer
   x = 1,308.41