Finding the Fourth Proportional to 12,538.96, 18,804.42 and 4,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,538.96 : 18,804.42 = 4,216.72 : x
2. Step 2: Convert to fraction form
   12,538.96/18,804.42 = 4,216.72/x
3. Step 3: Cross multiply
   12,538.96x = 18,804.42 × 4,216.72
4. Step 4: Simplify right side
   12,538.96x = 79,292,973.90
5. Step 5: Solve for x
   x = 79,292,973.90/12,538.96
6. Step 6: Final answer
   x = 6,323.73