Finding the Fourth Proportional to 13,333.74, 19,971.45 and 8,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,333.74 : 19,971.45 = 8,123.82 : x
2. Step 2: Convert to fraction form
   13,333.74/19,971.45 = 8,123.82/x
3. Step 3: Cross multiply
   13,333.74x = 19,971.45 × 8,123.82
4. Step 4: Simplify right side
   13,333.74x = 162,244,464.94
5. Step 5: Solve for x
   x = 162,244,464.94/13,333.74
6. Step 6: Final answer
   x = 12,167.96