Finding the Fourth Proportional to 12,126.61, 18,189.71 and 5,885.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,126.61 : 18,189.71 = 5,885.56 : x
2. Step 2: Convert to fraction form
   12,126.61/18,189.71 = 5,885.56/x
3. Step 3: Cross multiply
   12,126.61x = 18,189.71 × 5,885.56
4. Step 4: Simplify right side
   12,126.61x = 107,056,629.59
5. Step 5: Solve for x
   x = 107,056,629.59/12,126.61
6. Step 6: Final answer
   x = 8,828.24