Finding the Fourth Proportional to 101,426.78, 139,921.83 and 65,628.36

Step by Step Solution

1. Step 1: Write the proportion equation
   101,426.78 : 139,921.83 = 65,628.36 : x
2. Step 2: Convert to fraction form
   101,426.78/139,921.83 = 65,628.36/x
3. Step 3: Cross multiply
   101,426.78x = 139,921.83 × 65,628.36
4. Step 4: Simplify right side
   101,426.78x = 9,182,840,231.10
5. Step 5: Solve for x
   x = 9,182,840,231.10/101,426.78
6. Step 6: Final answer
   x = 90,536.64