Finding the Fourth Proportional to 22,020.66, 33,026.13 and 7,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,020.66 : 33,026.13 = 7,978.50 : x
2. Step 2: Convert to fraction form
   22,020.66/33,026.13 = 7,978.50/x
3. Step 3: Cross multiply
   22,020.66x = 33,026.13 × 7,978.50
4. Step 4: Simplify right side
   22,020.66x = 263,498,978.21
5. Step 5: Solve for x
   x = 263,498,978.21/22,020.66
6. Step 6: Final answer
   x = 11,965.99