Finding the Fourth Proportional to 13,860.78, 19,125.67 and 7,892.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,860.78 : 19,125.67 = 7,892.56 : x
2. Step 2: Convert to fraction form
   13,860.78/19,125.67 = 7,892.56/x
3. Step 3: Cross multiply
   13,860.78x = 19,125.67 × 7,892.56
4. Step 4: Simplify right side
   13,860.78x = 150,950,498.02
5. Step 5: Solve for x
   x = 150,950,498.02/13,860.78
6. Step 6: Final answer
   x = 10,890.48