Finding the Fourth Proportional to 100,931.37, 139,284.61 and 55,608.32

Step by Step Solution

1. Step 1: Write the proportion equation
   100,931.37 : 139,284.61 = 55,608.32 : x
2. Step 2: Convert to fraction form
   100,931.37/139,284.61 = 55,608.32/x
3. Step 3: Cross multiply
   100,931.37x = 139,284.61 × 55,608.32
4. Step 4: Simplify right side
   100,931.37x = 7,745,383,685.94
5. Step 5: Solve for x
   x = 7,745,383,685.94/100,931.37
6. Step 6: Final answer
   x = 76,739.11