Finding the Fourth Proportional to 31,426.48, 47,140.16 and 10,368.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,426.48 : 47,140.16 = 10,368.72 : x
2. Step 2: Convert to fraction form
   31,426.48/47,140.16 = 10,368.72/x
3. Step 3: Cross multiply
   31,426.48x = 47,140.16 × 10,368.72
4. Step 4: Simplify right side
   31,426.48x = 488,783,119.80
5. Step 5: Solve for x
   x = 488,783,119.80/31,426.48
6. Step 6: Final answer
   x = 15,553.23