Finding the Fourth Proportional to 12,412.22, 17,099.89 and 8,628.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,412.22 : 17,099.89 = 8,628.81 : x
2. Step 2: Convert to fraction form
   12,412.22/17,099.89 = 8,628.81/x
3. Step 3: Cross multiply
   12,412.22x = 17,099.89 × 8,628.81
4. Step 4: Simplify right side
   12,412.22x = 147,551,701.83
5. Step 5: Solve for x
   x = 147,551,701.83/12,412.22
6. Step 6: Final answer
   x = 11,887.62