Finding the Fourth Proportional to 101,231.67, 139,697.16 and 55,289.40

Step by Step Solution

1. Step 1: Write the proportion equation
   101,231.67 : 139,697.16 = 55,289.40 : x
2. Step 2: Convert to fraction form
   101,231.67/139,697.16 = 55,289.40/x
3. Step 3: Cross multiply
   101,231.67x = 139,697.16 × 55,289.40
4. Step 4: Simplify right side
   101,231.67x = 7,723,772,158.10
5. Step 5: Solve for x
   x = 7,723,772,158.10/101,231.67
6. Step 6: Final answer
   x = 76,297.98