Finding the Fourth Proportional to 101,018.97, 139,398.71 and 55,697.85

Step by Step Solution

1. Step 1: Write the proportion equation
   101,018.97 : 139,398.71 = 55,697.85 : x
2. Step 2: Convert to fraction form
   101,018.97/139,398.71 = 55,697.85/x
3. Step 3: Cross multiply
   101,018.97x = 139,398.71 × 55,697.85
4. Step 4: Simplify right side
   101,018.97x = 7,764,208,161.28
5. Step 5: Solve for x
   x = 7,764,208,161.28/101,018.97
6. Step 6: Final answer
   x = 76,858.91