Finding the Fourth Proportional to 12,146.86, 18,221.34 and 3,381.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.86 : 18,221.34 = 3,381.88 : x
2. Step 2: Convert to fraction form
   12,146.86/18,221.34 = 3,381.88/x
3. Step 3: Cross multiply
   12,146.86x = 18,221.34 × 3,381.88
4. Step 4: Simplify right side
   12,146.86x = 61,622,385.32
5. Step 5: Solve for x
   x = 61,622,385.32/12,146.86
6. Step 6: Final answer
   x = 5,073.11