Finding the Fourth Proportional to 11,793.20, 17,671.98 and 7,890.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,793.20 : 17,671.98 = 7,890.62 : x
2. Step 2: Convert to fraction form
   11,793.20/17,671.98 = 7,890.62/x
3. Step 3: Cross multiply
   11,793.20x = 17,671.98 × 7,890.62
4. Step 4: Simplify right side
   11,793.20x = 139,442,878.83
5. Step 5: Solve for x
   x = 139,442,878.83/11,793.20
6. Step 6: Final answer
   x = 11,824.01