Finding the Fourth Proportional to 15,558.27, 21,472.88 and 9,274.29

Step by Step Solution

1. Step 1: Write the proportion equation
   15,558.27 : 21,472.88 = 9,274.29 : x
2. Step 2: Convert to fraction form
   15,558.27/21,472.88 = 9,274.29/x
3. Step 3: Cross multiply
   15,558.27x = 21,472.88 × 9,274.29
4. Step 4: Simplify right side
   15,558.27x = 199,145,669.88
5. Step 5: Solve for x
   x = 199,145,669.88/15,558.27
6. Step 6: Final answer
   x = 12,799.99