Finding the Fourth Proportional to 101,139.28, 139,571.94 and 55,816.96

Step by Step Solution

1. Step 1: Write the proportion equation
   101,139.28 : 139,571.94 = 55,816.96 : x
2. Step 2: Convert to fraction form
   101,139.28/139,571.94 = 55,816.96/x
3. Step 3: Cross multiply
   101,139.28x = 139,571.94 × 55,816.96
4. Step 4: Simplify right side
   101,139.28x = 7,790,481,392.10
5. Step 5: Solve for x
   x = 7,790,481,392.10/101,139.28
6. Step 6: Final answer
   x = 77,027.26