Finding the Fourth Proportional to 12,445.91, 18,672.32 and 5,426.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.91 : 18,672.32 = 5,426.54 : x
2. Step 2: Convert to fraction form
   12,445.91/18,672.32 = 5,426.54/x
3. Step 3: Cross multiply
   12,445.91x = 18,672.32 × 5,426.54
4. Step 4: Simplify right side
   12,445.91x = 101,326,047.51
5. Step 5: Solve for x
   x = 101,326,047.51/12,445.91
6. Step 6: Final answer
   x = 8,141.31