Finding the Fourth Proportional to 10,141.01, 14,066.18 and 9,871.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,141.01 : 14,066.18 = 9,871.28 : x
2. Step 2: Convert to fraction form
   10,141.01/14,066.18 = 9,871.28/x
3. Step 3: Cross multiply
   10,141.01x = 14,066.18 × 9,871.28
4. Step 4: Simplify right side
   10,141.01x = 138,851,155.66
5. Step 5: Solve for x
   x = 138,851,155.66/10,141.01
6. Step 6: Final answer
   x = 13,692.05