Finding the Fourth Proportional to 65,778.72, 90,773.28 and 35,970.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,778.72 : 90,773.28 = 35,970.72 : x
2. Step 2: Convert to fraction form
   65,778.72/90,773.28 = 35,970.72/x
3. Step 3: Cross multiply
   65,778.72x = 90,773.28 × 35,970.72
4. Step 4: Simplify right side
   65,778.72x = 3,265,180,238.36
5. Step 5: Solve for x
   x = 3,265,180,238.36/65,778.72
6. Step 6: Final answer
   x = 49,638.85