Finding the Fourth Proportional to 13,931.56, 19,225.50 and 7,644.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,931.56 : 19,225.50 = 7,644.04 : x
2. Step 2: Convert to fraction form
   13,931.56/19,225.50 = 7,644.04/x
3. Step 3: Cross multiply
   13,931.56x = 19,225.50 × 7,644.04
4. Step 4: Simplify right side
   13,931.56x = 146,960,491.02
5. Step 5: Solve for x
   x = 146,960,491.02/13,931.56
6. Step 6: Final answer
   x = 10,548.75