Finding the Fourth Proportional to 12,131.46, 18,191.34 and 4,233.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.46 : 18,191.34 = 4,233.78 : x
2. Step 2: Convert to fraction form
   12,131.46/18,191.34 = 4,233.78/x
3. Step 3: Cross multiply
   12,131.46x = 18,191.34 × 4,233.78
4. Step 4: Simplify right side
   12,131.46x = 77,018,131.47
5. Step 5: Solve for x
   x = 77,018,131.47/12,131.46
6. Step 6: Final answer
   x = 6,348.63