Finding the Fourth Proportional to 47,257.72, 70,900.41 and 13,978.67

Step by Step Solution

1. Step 1: Write the proportion equation
   47,257.72 : 70,900.41 = 13,978.67 : x
2. Step 2: Convert to fraction form
   47,257.72/70,900.41 = 13,978.67/x
3. Step 3: Cross multiply
   47,257.72x = 70,900.41 × 13,978.67
4. Step 4: Simplify right side
   47,257.72x = 991,093,132.17
5. Step 5: Solve for x
   x = 991,093,132.17/47,257.72
6. Step 6: Final answer
   x = 20,972.09