Finding the Fourth Proportional to 22,469.10, 30,978.56 and 18,421.26

Step by Step Solution

1. Step 1: Write the proportion equation
   22,469.10 : 30,978.56 = 18,421.26 : x
2. Step 2: Convert to fraction form
   22,469.10/30,978.56 = 18,421.26/x
3. Step 3: Cross multiply
   22,469.10x = 30,978.56 × 18,421.26
4. Step 4: Simplify right side
   22,469.10x = 570,664,108.19
5. Step 5: Solve for x
   x = 570,664,108.19/22,469.10
6. Step 6: Final answer
   x = 25,397.73