Finding the Fourth Proportional to 64,786.42, 89,406.73 and 36,109.03

Step by Step Solution

1. Step 1: Write the proportion equation
   64,786.42 : 89,406.73 = 36,109.03 : x
2. Step 2: Convert to fraction form
   64,786.42/89,406.73 = 36,109.03/x
3. Step 3: Cross multiply
   64,786.42x = 89,406.73 × 36,109.03
4. Step 4: Simplify right side
   64,786.42x = 3,228,390,117.39
5. Step 5: Solve for x
   x = 3,228,390,117.39/64,786.42
6. Step 6: Final answer
   x = 49,831.28