Finding the Fourth Proportional to 14,061.40, 19,404.78 and 7,688.08

Step by Step Solution

1. Step 1: Write the proportion equation
   14,061.40 : 19,404.78 = 7,688.08 : x
2. Step 2: Convert to fraction form
   14,061.40/19,404.78 = 7,688.08/x
3. Step 3: Cross multiply
   14,061.40x = 19,404.78 × 7,688.08
4. Step 4: Simplify right side
   14,061.40x = 149,185,501.02
5. Step 5: Solve for x
   x = 149,185,501.02/14,061.40
6. Step 6: Final answer
   x = 10,609.58