Finding the Fourth Proportional to 101,278.72, 139,770.88 and 55,956.48

Step by Step Solution

1. Step 1: Write the proportion equation
   101,278.72 : 139,770.88 = 55,956.48 : x
2. Step 2: Convert to fraction form
   101,278.72/139,770.88 = 55,956.48/x
3. Step 3: Cross multiply
   101,278.72x = 139,770.88 × 55,956.48
4. Step 4: Simplify right side
   101,278.72x = 7,821,086,451.30
5. Step 5: Solve for x
   x = 7,821,086,451.30/101,278.72
6. Step 6: Final answer
   x = 77,223.39