Finding the Fourth Proportional to 65,403.77, 90,233.91 and 42,755.76

Step by Step Solution

1. Step 1: Write the proportion equation
   65,403.77 : 90,233.91 = 42,755.76 : x
2. Step 2: Convert to fraction form
   65,403.77/90,233.91 = 42,755.76/x
3. Step 3: Cross multiply
   65,403.77x = 90,233.91 × 42,755.76
4. Step 4: Simplify right side
   65,403.77x = 3,858,019,399.82
5. Step 5: Solve for x
   x = 3,858,019,399.82/65,403.77
6. Step 6: Final answer
   x = 58,987.73