Finding the Fourth Proportional to 16,785.78, 25,174.76 and 7,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,785.78 : 25,174.76 = 7,420.72 : x
2. Step 2: Convert to fraction form
   16,785.78/25,174.76 = 7,420.72/x
3. Step 3: Cross multiply
   16,785.78x = 25,174.76 × 7,420.72
4. Step 4: Simplify right side
   16,785.78x = 186,814,845.03
5. Step 5: Solve for x
   x = 186,814,845.03/16,785.78
6. Step 6: Final answer
   x = 11,129.35