Finding the Fourth Proportional to 13,859.31, 19,125.86 and 7,571.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,859.31 : 19,125.86 = 7,571.69 : x
2. Step 2: Convert to fraction form
   13,859.31/19,125.86 = 7,571.69/x
3. Step 3: Cross multiply
   13,859.31x = 19,125.86 × 7,571.69
4. Step 4: Simplify right side
   13,859.31x = 144,815,082.90
5. Step 5: Solve for x
   x = 144,815,082.90/13,859.31
6. Step 6: Final answer
   x = 10,448.94