Finding the Fourth Proportional to 13,871.85, 19,142.33 and 7,902.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,871.85 : 19,142.33 = 7,902.69 : x
2. Step 2: Convert to fraction form
   13,871.85/19,142.33 = 7,902.69/x
3. Step 3: Cross multiply
   13,871.85x = 19,142.33 × 7,902.69
4. Step 4: Simplify right side
   13,871.85x = 151,275,899.87
5. Step 5: Solve for x
   x = 151,275,899.87/13,871.85
6. Step 6: Final answer
   x = 10,905.24