Finding the Fourth Proportional to 21,401.10, 29,466.42 and 19,432.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.10 : 29,466.42 = 19,432.80 : x
2. Step 2: Convert to fraction form
   21,401.10/29,466.42 = 19,432.80/x
3. Step 3: Cross multiply
   21,401.10x = 29,466.42 × 19,432.80
4. Step 4: Simplify right side
   21,401.10x = 572,615,046.58
5. Step 5: Solve for x
   x = 572,615,046.58/21,401.10
6. Step 6: Final answer
   x = 26,756.34