Finding the Fourth Proportional to 10,615.24, 14,638.89 and 7,219.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,615.24 : 14,638.89 = 7,219.72 : x
2. Step 2: Convert to fraction form
   10,615.24/14,638.89 = 7,219.72/x
3. Step 3: Cross multiply
   10,615.24x = 14,638.89 × 7,219.72
4. Step 4: Simplify right side
   10,615.24x = 105,688,686.91
5. Step 5: Solve for x
   x = 105,688,686.91/10,615.24
6. Step 6: Final answer
   x = 9,956.32