Finding the Fourth Proportional to 12,155.61, 18,196.96 and 8,646.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.61 : 18,196.96 = 8,646.69 : x
2. Step 2: Convert to fraction form
   12,155.61/18,196.96 = 8,646.69/x
3. Step 3: Cross multiply
   12,155.61x = 18,196.96 × 8,646.69
4. Step 4: Simplify right side
   12,155.61x = 157,343,426.57
5. Step 5: Solve for x
   x = 157,343,426.57/12,155.61
6. Step 6: Final answer
   x = 12,944.10