Finding the Fourth Proportional to 10,387.94, 15,581.76 and 4,838.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387.94 : 15,581.76 = 4,838.18 : x
2. Step 2: Convert to fraction form
   10,387.94/15,581.76 = 4,838.18/x
3. Step 3: Cross multiply
   10,387.94x = 15,581.76 × 4,838.18
4. Step 4: Simplify right side
   10,387.94x = 75,387,359.60
5. Step 5: Solve for x
   x = 75,387,359.60/10,387.94
6. Step 6: Final answer
   x = 7,257.20