Finding the Fourth Proportional to 10,081.60, 15,115.92 and 4,813.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.60 : 15,115.92 = 4,813.76 : x
2. Step 2: Convert to fraction form
   10,081.60/15,115.92 = 4,813.76/x
3. Step 3: Cross multiply
   10,081.60x = 15,115.92 × 4,813.76
4. Step 4: Simplify right side
   10,081.60x = 72,764,411.06
5. Step 5: Solve for x
   x = 72,764,411.06/10,081.60
6. Step 6: Final answer
   x = 7,217.55