Finding the Fourth Proportional to 13,871.52, 19,142.87 and 7,903.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,871.52 : 19,142.87 = 7,903.31 : x
2. Step 2: Convert to fraction form
   13,871.52/19,142.87 = 7,903.31/x
3. Step 3: Cross multiply
   13,871.52x = 19,142.87 × 7,903.31
4. Step 4: Simplify right side
   13,871.52x = 151,291,900.67
5. Step 5: Solve for x
   x = 151,291,900.67/13,871.52
6. Step 6: Final answer
   x = 10,906.66