Finding the Fourth Proportional to 10,698.72, 16,007.76 and 7,418.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,698.72 : 16,007.76 = 7,418.16 : x
2. Step 2: Convert to fraction form
   10,698.72/16,007.76 = 7,418.16/x
3. Step 3: Cross multiply
   10,698.72x = 16,007.76 × 7,418.16
4. Step 4: Simplify right side
   10,698.72x = 118,748,124.92
5. Step 5: Solve for x
   x = 118,748,124.92/10,698.72
6. Step 6: Final answer
   x = 11,099.28