Finding the Fourth Proportional to 65,186.37, 89,958.47 and 42,539.85

Step by Step Solution

1. Step 1: Write the proportion equation
   65,186.37 : 89,958.47 = 42,539.85 : x
2. Step 2: Convert to fraction form
   65,186.37/89,958.47 = 42,539.85/x
3. Step 3: Cross multiply
   65,186.37x = 89,958.47 × 42,539.85
4. Step 4: Simplify right side
   65,186.37x = 3,826,819,607.33
5. Step 5: Solve for x
   x = 3,826,819,607.33/65,186.37
6. Step 6: Final answer
   x = 58,705.82