Finding the Fourth Proportional to 21,401.60, 29,467.12 and 19,433.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.60 : 29,467.12 = 19,433.30 : x
2. Step 2: Convert to fraction form
   21,401.60/29,467.12 = 19,433.30/x
3. Step 3: Cross multiply
   21,401.60x = 29,467.12 × 19,433.30
4. Step 4: Simplify right side
   21,401.60x = 572,643,383.10
5. Step 5: Solve for x
   x = 572,643,383.10/21,401.60
6. Step 6: Final answer
   x = 26,757.04