Finding the Fourth Proportional to 10,855.46, 14,980.29 and 6,139.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,855.46 : 14,980.29 = 6,139.82 : x
2. Step 2: Convert to fraction form
   10,855.46/14,980.29 = 6,139.82/x
3. Step 3: Cross multiply
   10,855.46x = 14,980.29 × 6,139.82
4. Step 4: Simplify right side
   10,855.46x = 91,976,284.15
5. Step 5: Solve for x
   x = 91,976,284.15/10,855.46
6. Step 6: Final answer
   x = 8,472.81