Finding the Fourth Proportional to 13,872.56, 19,145.90 and 7,906.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,872.56 : 19,145.90 = 7,906.37 : x
2. Step 2: Convert to fraction form
   13,872.56/19,145.90 = 7,906.37/x
3. Step 3: Cross multiply
   13,872.56x = 19,145.90 × 7,906.37
4. Step 4: Simplify right side
   13,872.56x = 151,374,493.42
5. Step 5: Solve for x
   x = 151,374,493.42/13,872.56
6. Step 6: Final answer
   x = 10,911.80