Finding the Fourth Proportional to 24,978.51, 34,469.34 and 13,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   24,978.51 : 34,469.34 = 13,647.72 : x
2. Step 2: Convert to fraction form
   24,978.51/34,469.34 = 13,647.72/x
3. Step 3: Cross multiply
   24,978.51x = 34,469.34 × 13,647.72
4. Step 4: Simplify right side
   24,978.51x = 470,427,900.90
5. Step 5: Solve for x
   x = 470,427,900.90/24,978.51
6. Step 6: Final answer
   x = 18,833.31