Finding the Fourth Proportional to 65,778.69, 90,774.58 and 35,564.01

Step by Step Solution

1. Step 1: Write the proportion equation
   65,778.69 : 90,774.58 = 35,564.01 : x
2. Step 2: Convert to fraction form
   65,778.69/90,774.58 = 35,564.01/x
3. Step 3: Cross multiply
   65,778.69x = 90,774.58 × 35,564.01
4. Step 4: Simplify right side
   65,778.69x = 3,228,308,318.86
5. Step 5: Solve for x
   x = 3,228,308,318.86/65,778.69
6. Step 6: Final answer
   x = 49,078.33