Finding the Fourth Proportional to 11,843.92, 16,342.81 and 7,870.87

Step by Step Solution

1. Step 1: Write the proportion equation
   11,843.92 : 16,342.81 = 7,870.87 : x
2. Step 2: Convert to fraction form
   11,843.92/16,342.81 = 7,870.87/x
3. Step 3: Cross multiply
   11,843.92x = 16,342.81 × 7,870.87
4. Step 4: Simplify right side
   11,843.92x = 128,632,132.94
5. Step 5: Solve for x
   x = 128,632,132.94/11,843.92
6. Step 6: Final answer
   x = 10,860.60