Finding the Fourth Proportional to 13,663.36, 20,496.18 and 3,802.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,663.36 : 20,496.18 = 3,802.72 : x
2. Step 2: Convert to fraction form
   13,663.36/20,496.18 = 3,802.72/x
3. Step 3: Cross multiply
   13,663.36x = 20,496.18 × 3,802.72
4. Step 4: Simplify right side
   13,663.36x = 77,941,233.61
5. Step 5: Solve for x
   x = 77,941,233.61/13,663.36
6. Step 6: Final answer
   x = 5,704.40