Finding the Fourth Proportional to 19,978.32, 27,581.13 and 12,022.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.32 : 27,581.13 = 12,022.50 : x
2. Step 2: Convert to fraction form
   19,978.32/27,581.13 = 12,022.50/x
3. Step 3: Cross multiply
   19,978.32x = 27,581.13 × 12,022.50
4. Step 4: Simplify right side
   19,978.32x = 331,594,135.43
5. Step 5: Solve for x
   x = 331,594,135.43/19,978.32
6. Step 6: Final answer
   x = 16,597.70