Finding the Fourth Proportional to 10,706.16, 16,038.45 and 7,889.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,706.16 : 16,038.45 = 7,889.88 : x
2. Step 2: Convert to fraction form
   10,706.16/16,038.45 = 7,889.88/x
3. Step 3: Cross multiply
   10,706.16x = 16,038.45 × 7,889.88
4. Step 4: Simplify right side
   10,706.16x = 126,541,445.89
5. Step 5: Solve for x
   x = 126,541,445.89/10,706.16
6. Step 6: Final answer
   x = 11,819.50