Finding the Fourth Proportional to 65,650.50, 90,335.25 and 63,813.42

Step by Step Solution

1. Step 1: Write the proportion equation
   65,650.50 : 90,335.25 = 63,813.42 : x
2. Step 2: Convert to fraction form
   65,650.50/90,335.25 = 63,813.42/x
3. Step 3: Cross multiply
   65,650.50x = 90,335.25 × 63,813.42
4. Step 4: Simplify right side
   65,650.50x = 5,764,601,249.06
5. Step 5: Solve for x
   x = 5,764,601,249.06/65,650.50
6. Step 6: Final answer
   x = 87,807.42