Finding the Fourth Proportional to 9,872.18, 13,614.57 and 7,719

Step by Step Solution

1. Step 1: Write the proportion equation
   9,872.18 : 13,614.57 = 7,719 : x
2. Step 2: Convert to fraction form
   9,872.18/13,614.57 = 7,719/x
3. Step 3: Cross multiply
   9,872.18x = 13,614.57 × 7,719
4. Step 4: Simplify right side
   9,872.18x = 105,090,865.83
5. Step 5: Solve for x
   x = 105,090,865.83/9,872.18
6. Step 6: Final answer
   x = 10,645.16