Finding the Fourth Proportional to 21,878.42, 30,212.92 and 17,434.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,878.42 : 30,212.92 = 17,434.86 : x
2. Step 2: Convert to fraction form
   21,878.42/30,212.92 = 17,434.86/x
3. Step 3: Cross multiply
   21,878.42x = 30,212.92 × 17,434.86
4. Step 4: Simplify right side
   21,878.42x = 526,758,030.39
5. Step 5: Solve for x
   x = 526,758,030.39/21,878.42
6. Step 6: Final answer
   x = 24,076.60