Finding the Fourth Proportional to 15,389.72, 21,236.28 and 9,423.08

Step by Step Solution

1. Step 1: Write the proportion equation
   15,389.72 : 21,236.28 = 9,423.08 : x
2. Step 2: Convert to fraction form
   15,389.72/21,236.28 = 9,423.08/x
3. Step 3: Cross multiply
   15,389.72x = 21,236.28 × 9,423.08
4. Step 4: Simplify right side
   15,389.72x = 200,111,165.34
5. Step 5: Solve for x
   x = 200,111,165.34/15,389.72
6. Step 6: Final answer
   x = 13,002.91