Finding the Fourth Proportional to 23,783.76, 32,789.61 and 20,412

Step by Step Solution

1. Step 1: Write the proportion equation
   23,783.76 : 32,789.61 = 20,412 : x
2. Step 2: Convert to fraction form
   23,783.76/32,789.61 = 20,412/x
3. Step 3: Cross multiply
   23,783.76x = 32,789.61 × 20,412
4. Step 4: Simplify right side
   23,783.76x = 669,301,519.32
5. Step 5: Solve for x
   x = 669,301,519.32/23,783.76
6. Step 6: Final answer
   x = 28,141.11