Finding the Fourth Proportional to 13,931.88, 19,225.83 and 7,644.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,931.88 : 19,225.83 = 7,644.25 : x
2. Step 2: Convert to fraction form
   13,931.88/19,225.83 = 7,644.25/x
3. Step 3: Cross multiply
   13,931.88x = 19,225.83 × 7,644.25
4. Step 4: Simplify right side
   13,931.88x = 146,967,050.98
5. Step 5: Solve for x
   x = 146,967,050.98/13,931.88
6. Step 6: Final answer
   x = 10,548.97