Finding the Fourth Proportional to 12,248.78, 18,372.17 and 3,926.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,248.78 : 18,372.17 = 3,926.56 : x
2. Step 2: Convert to fraction form
   12,248.78/18,372.17 = 3,926.56/x
3. Step 3: Cross multiply
   12,248.78x = 18,372.17 × 3,926.56
4. Step 4: Simplify right side
   12,248.78x = 72,139,427.84
5. Step 5: Solve for x
   x = 72,139,427.84/12,248.78
6. Step 6: Final answer
   x = 5,889.52