Finding the Fourth Proportional to 65,176.12, 89,944.32 and 42,529.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,176.12 : 89,944.32 = 42,529.60 : x
2. Step 2: Convert to fraction form
   65,176.12/89,944.32 = 42,529.60/x
3. Step 3: Cross multiply
   65,176.12x = 89,944.32 × 42,529.60
4. Step 4: Simplify right side
   65,176.12x = 3,825,295,951.87
5. Step 5: Solve for x
   x = 3,825,295,951.87/65,176.12
6. Step 6: Final answer
   x = 58,691.68