Finding the Fourth Proportional to 31,459.32, 47,178.87 and 10,395.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,459.32 : 47,178.87 = 10,395.42 : x
2. Step 2: Convert to fraction form
   31,459.32/47,178.87 = 10,395.42/x
3. Step 3: Cross multiply
   31,459.32x = 47,178.87 × 10,395.42
4. Step 4: Simplify right side
   31,459.32x = 490,444,168.78
5. Step 5: Solve for x
   x = 490,444,168.78/31,459.32
6. Step 6: Final answer
   x = 15,589.79