Finding the Fourth Proportional to 65,186.25, 89,958.29 and 42,539.73

Step by Step Solution

1. Step 1: Write the proportion equation
   65,186.25 : 89,958.29 = 42,539.73 : x
2. Step 2: Convert to fraction form
   65,186.25/89,958.29 = 42,539.73/x
3. Step 3: Cross multiply
   65,186.25x = 89,958.29 × 42,539.73
4. Step 4: Simplify right side
   65,186.25x = 3,826,801,367.86
5. Step 5: Solve for x
   x = 3,826,801,367.86/65,186.25
6. Step 6: Final answer
   x = 58,705.65