Finding the Fourth Proportional to 13,461.96, 20,196.33 and 7,919.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,461.96 : 20,196.33 = 7,919.94 : x
2. Step 2: Convert to fraction form
   13,461.96/20,196.33 = 7,919.94/x
3. Step 3: Cross multiply
   13,461.96x = 20,196.33 × 7,919.94
4. Step 4: Simplify right side
   13,461.96x = 159,953,721.82
5. Step 5: Solve for x
   x = 159,953,721.82/13,461.96
6. Step 6: Final answer
   x = 11,881.90