Finding the Fourth Proportional to 13,909.73, 19,196.78 and 7,942.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,909.73 : 19,196.78 = 7,942.28 : x
2. Step 2: Convert to fraction form
   13,909.73/19,196.78 = 7,942.28/x
3. Step 3: Cross multiply
   13,909.73x = 19,196.78 × 7,942.28
4. Step 4: Simplify right side
   13,909.73x = 152,466,066.16
5. Step 5: Solve for x
   x = 152,466,066.16/13,909.73
6. Step 6: Final answer
   x = 10,961.11