Finding the Fourth Proportional to 12,043.72, 18,071.34 and 4,256.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,043.72 : 18,071.34 = 4,256.20 : x
2. Step 2: Convert to fraction form
   12,043.72/18,071.34 = 4,256.20/x
3. Step 3: Cross multiply
   12,043.72x = 18,071.34 × 4,256.20
4. Step 4: Simplify right side
   12,043.72x = 76,915,237.31
5. Step 5: Solve for x
   x = 76,915,237.31/12,043.72
6. Step 6: Final answer
   x = 6,386.34