Finding the Fourth Proportional to 21,419.55, 29,558.37 and 12,466.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,419.55 : 29,558.37 = 12,466.86 : x
2. Step 2: Convert to fraction form
   21,419.55/29,558.37 = 12,466.86/x
3. Step 3: Cross multiply
   21,419.55x = 29,558.37 × 12,466.86
4. Step 4: Simplify right side
   21,419.55x = 368,500,060.62
5. Step 5: Solve for x
   x = 368,500,060.62/21,419.55
6. Step 6: Final answer
   x = 17,203.91