Finding the Fourth Proportional to 65,322.15, 90,163.76 and 42,664.61

Step by Step Solution

1. Step 1: Write the proportion equation
   65,322.15 : 90,163.76 = 42,664.61 : x
2. Step 2: Convert to fraction form
   65,322.15/90,163.76 = 42,664.61/x
3. Step 3: Cross multiply
   65,322.15x = 90,163.76 × 42,664.61
4. Step 4: Simplify right side
   65,322.15x = 3,846,800,992.39
5. Step 5: Solve for x
   x = 3,846,800,992.39/65,322.15
6. Step 6: Final answer
   x = 58,889.69