Finding the Fourth Proportional to 16,647.74, 24,978.15 and 7,890.02

Step by Step Solution

1. Step 1: Write the proportion equation
   16,647.74 : 24,978.15 = 7,890.02 : x
2. Step 2: Convert to fraction form
   16,647.74/24,978.15 = 7,890.02/x
3. Step 3: Cross multiply
   16,647.74x = 24,978.15 × 7,890.02
4. Step 4: Simplify right side
   16,647.74x = 197,077,978.17
5. Step 5: Solve for x
   x = 197,077,978.17/16,647.74
6. Step 6: Final answer
   x = 11,838.13