Finding the Fourth Proportional to 16,778.10, 25,167.69 and 5,091.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,778.10 : 25,167.69 = 5,091.42 : x
2. Step 2: Convert to fraction form
   16,778.10/25,167.69 = 5,091.42/x
3. Step 3: Cross multiply
   16,778.10x = 25,167.69 × 5,091.42
4. Step 4: Simplify right side
   16,778.10x = 128,139,280.22
5. Step 5: Solve for x
   x = 128,139,280.22/16,778.10
6. Step 6: Final answer
   x = 7,637.29