Finding the Fourth Proportional to 31,436.54, 47,156.28 and 10,378.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,436.54 : 47,156.28 = 10,378.42 : x
2. Step 2: Convert to fraction form
   31,436.54/47,156.28 = 10,378.42/x
3. Step 3: Cross multiply
   31,436.54x = 47,156.28 × 10,378.42
4. Step 4: Simplify right side
   31,436.54x = 489,407,679.48
5. Step 5: Solve for x
   x = 489,407,679.48/31,436.54
6. Step 6: Final answer
   x = 15,568.12