Finding the Fourth Proportional to 12,111.08, 16,724.22 and 7,642.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.08 : 16,724.22 = 7,642.76 : x
2. Step 2: Convert to fraction form
   12,111.08/16,724.22 = 7,642.76/x
3. Step 3: Cross multiply
   12,111.08x = 16,724.22 × 7,642.76
4. Step 4: Simplify right side
   12,111.08x = 127,819,199.65
5. Step 5: Solve for x
   x = 127,819,199.65/12,111.08
6. Step 6: Final answer
   x = 10,553.91