Finding the Fourth Proportional to 31,404.15, 47,106.27 and 13,870.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,404.15 : 47,106.27 = 13,870.49 : x
2. Step 2: Convert to fraction form
   31,404.15/47,106.27 = 13,870.49/x
3. Step 3: Cross multiply
   31,404.15x = 47,106.27 × 13,870.49
4. Step 4: Simplify right side
   31,404.15x = 653,386,811.44
5. Step 5: Solve for x
   x = 653,386,811.44/31,404.15
6. Step 6: Final answer
   x = 20,805.75