Finding the Fourth Proportional to 23,978.17, 33,122.16 and 21,742.57

Step by Step Solution

1. Step 1: Write the proportion equation
   23,978.17 : 33,122.16 = 21,742.57 : x
2. Step 2: Convert to fraction form
   23,978.17/33,122.16 = 21,742.57/x
3. Step 3: Cross multiply
   23,978.17x = 33,122.16 × 21,742.57
4. Step 4: Simplify right side
   23,978.17x = 720,160,882.35
5. Step 5: Solve for x
   x = 720,160,882.35/23,978.17
6. Step 6: Final answer
   x = 30,034.02