Finding the Fourth Proportional to 23,978.30, 33,104.23 and 21,318.35

Step by Step Solution

1. Step 1: Write the proportion equation
   23,978.30 : 33,104.23 = 21,318.35 : x
2. Step 2: Convert to fraction form
   23,978.30/33,104.23 = 21,318.35/x
3. Step 3: Cross multiply
   23,978.30x = 33,104.23 × 21,318.35
4. Step 4: Simplify right side
   23,978.30x = 705,727,561.62
5. Step 5: Solve for x
   x = 705,727,561.62/23,978.30
6. Step 6: Final answer
   x = 29,431.93