Finding the Fourth Proportional to 13,910.42, 19,196.86 and 7,622.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,910.42 : 19,196.86 = 7,622.80 : x
2. Step 2: Convert to fraction form
   13,910.42/19,196.86 = 7,622.80/x
3. Step 3: Cross multiply
   13,910.42x = 19,196.86 × 7,622.80
4. Step 4: Simplify right side
   13,910.42x = 146,333,824.41
5. Step 5: Solve for x
   x = 146,333,824.41/13,910.42
6. Step 6: Final answer
   x = 10,519.73