Finding the Fourth Proportional to 13,870.69, 19,142.33 and 7,904.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,870.69 : 19,142.33 = 7,904.23 : x
2. Step 2: Convert to fraction form
   13,870.69/19,142.33 = 7,904.23/x
3. Step 3: Cross multiply
   13,870.69x = 19,142.33 × 7,904.23
4. Step 4: Simplify right side
   13,870.69x = 151,305,379.06
5. Step 5: Solve for x
   x = 151,305,379.06/13,870.69
6. Step 6: Final answer
   x = 10,908.28