Finding the Fourth Proportional to 101,057.94, 139,456.62 and 55,736.78

Step by Step Solution

1. Step 1: Write the proportion equation
   101,057.94 : 139,456.62 = 55,736.78 : x
2. Step 2: Convert to fraction form
   101,057.94/139,456.62 = 55,736.78/x
3. Step 3: Cross multiply
   101,057.94x = 139,456.62 × 55,736.78
4. Step 4: Simplify right side
   101,057.94x = 7,772,862,251.20
5. Step 5: Solve for x
   x = 7,772,862,251.20/101,057.94
6. Step 6: Final answer
   x = 76,914.91