Finding the Fourth Proportional to 101,074.72, 139,485.90 and 55,755.76

Step by Step Solution

1. Step 1: Write the proportion equation
   101,074.72 : 139,485.90 = 55,755.76 : x
2. Step 2: Convert to fraction form
   101,074.72/139,485.90 = 55,755.76/x
3. Step 3: Cross multiply
   101,074.72x = 139,485.90 × 55,755.76
4. Step 4: Simplify right side
   101,074.72x = 7,777,142,363.78
5. Step 5: Solve for x
   x = 7,777,142,363.78/101,074.72
6. Step 6: Final answer
   x = 76,944.49