Finding the Fourth Proportional to 65,270.82, 90,073.62 and 39,777.30

Step by Step Solution

1. Step 1: Write the proportion equation
   65,270.82 : 90,073.62 = 39,777.30 : x
2. Step 2: Convert to fraction form
   65,270.82/90,073.62 = 39,777.30/x
3. Step 3: Cross multiply
   65,270.82x = 90,073.62 × 39,777.30
4. Step 4: Simplify right side
   65,270.82x = 3,582,885,404.83
5. Step 5: Solve for x
   x = 3,582,885,404.83/65,270.82
6. Step 6: Final answer
   x = 54,892.61