Finding the Fourth Proportional to 10,779.06, 14,840.34 and 8,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,779.06 : 14,840.34 = 8,386.10 : x
2. Step 2: Convert to fraction form
   10,779.06/14,840.34 = 8,386.10/x
3. Step 3: Cross multiply
   10,779.06x = 14,840.34 × 8,386.10
4. Step 4: Simplify right side
   10,779.06x = 124,452,575.27
5. Step 5: Solve for x
   x = 124,452,575.27/10,779.06
6. Step 6: Final answer
   x = 11,545.77