Finding the Fourth Proportional to 10,931.54, 16,410.34 and 10,485.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.54 : 16,410.34 = 10,485.94 : x
2. Step 2: Convert to fraction form
   10,931.54/16,410.34 = 10,485.94/x
3. Step 3: Cross multiply
   10,931.54x = 16,410.34 × 10,485.94
4. Step 4: Simplify right side
   10,931.54x = 172,077,840.62
5. Step 5: Solve for x
   x = 172,077,840.62/10,931.54
6. Step 6: Final answer
   x = 15,741.41