Finding the Fourth Proportional to 80,961.98, 111,682.60 and 47,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,961.98 : 111,682.60 = 47,421.50 : x
2. Step 2: Convert to fraction form
   80,961.98/111,682.60 = 47,421.50/x
3. Step 3: Cross multiply
   80,961.98x = 111,682.60 × 47,421.50
4. Step 4: Simplify right side
   80,961.98x = 5,296,155,738.93
5. Step 5: Solve for x
   x = 5,296,155,738.93/80,961.98
6. Step 6: Final answer
   x = 65,415.35