Finding the Fourth Proportional to 12,192.72, 18,290.16 and 3,427.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,192.72 : 18,290.16 = 3,427.72 : x
2. Step 2: Convert to fraction form
   12,192.72/18,290.16 = 3,427.72/x
3. Step 3: Cross multiply
   12,192.72x = 18,290.16 × 3,427.72
4. Step 4: Simplify right side
   12,192.72x = 62,693,547.24
5. Step 5: Solve for x
   x = 62,693,547.24/12,192.72
6. Step 6: Final answer
   x = 5,141.88