Finding the Fourth Proportional to 65,186.75, 89,958.99 and 42,540.23

Step by Step Solution

1. Step 1: Write the proportion equation
   65,186.75 : 89,958.99 = 42,540.23 : x
2. Step 2: Convert to fraction form
   65,186.75/89,958.99 = 42,540.23/x
3. Step 3: Cross multiply
   65,186.75x = 89,958.99 × 42,540.23
4. Step 4: Simplify right side
   65,186.75x = 3,826,875,675.37
5. Step 5: Solve for x
   x = 3,826,875,675.37/65,186.75
6. Step 6: Final answer
   x = 58,706.35