Finding the Fourth Proportional to 14,147.19, 19,523.05 and 7,686.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,147.19 : 19,523.05 = 7,686.78 : x
2. Step 2: Convert to fraction form
   14,147.19/19,523.05 = 7,686.78/x
3. Step 3: Cross multiply
   14,147.19x = 19,523.05 × 7,686.78
4. Step 4: Simplify right side
   14,147.19x = 150,069,390.28
5. Step 5: Solve for x
   x = 150,069,390.28/14,147.19
6. Step 6: Final answer
   x = 10,607.72