Finding the Fourth Proportional to 10,106.16, 15,105.86 and 8,779.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,106.16 : 15,105.86 = 8,779.38 : x
2. Step 2: Convert to fraction form
   10,106.16/15,105.86 = 8,779.38/x
3. Step 3: Cross multiply
   10,106.16x = 15,105.86 × 8,779.38
4. Step 4: Simplify right side
   10,106.16x = 132,620,041.27
5. Step 5: Solve for x
   x = 132,620,041.27/10,106.16
6. Step 6: Final answer
   x = 13,122.69