Finding the Fourth Proportional to 101,178.76, 139,599.54 and 65,355.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,178.76 : 139,599.54 = 65,355.72 : x
2. Step 2: Convert to fraction form
   101,178.76/139,599.54 = 65,355.72/x
3. Step 3: Cross multiply
   101,178.76x = 139,599.54 × 65,355.72
4. Step 4: Simplify right side
   101,178.76x = 9,123,628,448.37
5. Step 5: Solve for x
   x = 9,123,628,448.37/101,178.76
6. Step 6: Final answer
   x = 90,173.36