Finding the Fourth Proportional to 10,871.60, 16,160.81 and 10,552.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,871.60 : 16,160.81 = 10,552.32 : x
2. Step 2: Convert to fraction form
   10,871.60/16,160.81 = 10,552.32/x
3. Step 3: Cross multiply
   10,871.60x = 16,160.81 × 10,552.32
4. Step 4: Simplify right side
   10,871.60x = 170,533,985.82
5. Step 5: Solve for x
   x = 170,533,985.82/10,871.60
6. Step 6: Final answer
   x = 15,686.20