Finding the Fourth Proportional to 65,782.72, 90,778.80 and 35,974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,782.72 : 90,778.80 = 35,974.72 : x
2. Step 2: Convert to fraction form
   65,782.72/90,778.80 = 35,974.72/x
3. Step 3: Cross multiply
   65,782.72x = 90,778.80 × 35,974.72
4. Step 4: Simplify right side
   65,782.72x = 3,265,741,911.94
5. Step 5: Solve for x
   x = 3,265,741,911.94/65,782.72
6. Step 6: Final answer
   x = 49,644.37