Finding the Fourth Proportional to 21,103.10, 29,095.94 and 15,433.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,103.10 : 29,095.94 = 15,433.32 : x
2. Step 2: Convert to fraction form
   21,103.10/29,095.94 = 15,433.32/x
3. Step 3: Cross multiply
   21,103.10x = 29,095.94 × 15,433.32
4. Step 4: Simplify right side
   21,103.10x = 449,046,952.72
5. Step 5: Solve for x
   x = 449,046,952.72/21,103.10
6. Step 6: Final answer
   x = 21,278.72