Finding the Fourth Proportional to 13,866.72, 19,134.72 and 7,897.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,866.72 : 19,134.72 = 7,897.92 : x
2. Step 2: Convert to fraction form
   13,866.72/19,134.72 = 7,897.92/x
3. Step 3: Cross multiply
   13,866.72x = 19,134.72 × 7,897.92
4. Step 4: Simplify right side
   13,866.72x = 151,124,487.78
5. Step 5: Solve for x
   x = 151,124,487.78/13,866.72
6. Step 6: Final answer
   x = 10,898.36