Finding the Fourth Proportional to 2,087.92, 3,130.04 and 788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.92 : 3,130.04 = 788.72 : x
2. Step 2: Convert to fraction form
   2,087.92/3,130.04 = 788.72/x
3. Step 3: Cross multiply
   2,087.92x = 3,130.04 × 788.72
4. Step 4: Simplify right side
   2,087.92x = 2,468,725.15
5. Step 5: Solve for x
   x = 2,468,725.15/2,087.92
6. Step 6: Final answer
   x = 1,182.38