Finding the Fourth Proportional to 12,196.51, 18,294.86 and 3,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.51 : 18,294.86 = 3,431.50 : x
2. Step 2: Convert to fraction form
   12,196.51/18,294.86 = 3,431.50/x
3. Step 3: Cross multiply
   12,196.51x = 18,294.86 × 3,431.50
4. Step 4: Simplify right side
   12,196.51x = 62,778,774.93
5. Step 5: Solve for x
   x = 62,778,774.93/12,196.51
6. Step 6: Final answer
   x = 5,147.27