Finding the Fourth Proportional to 65,965.73, 91,028.21 and 42,089.76

Step by Step Solution

1. Step 1: Write the proportion equation
   65,965.73 : 91,028.21 = 42,089.76 : x
2. Step 2: Convert to fraction form
   65,965.73/91,028.21 = 42,089.76/x
3. Step 3: Cross multiply
   65,965.73x = 91,028.21 × 42,089.76
4. Step 4: Simplify right side
   65,965.73x = 3,831,355,301.68
5. Step 5: Solve for x
   x = 3,831,355,301.68/65,965.73
6. Step 6: Final answer
   x = 58,081.00