Finding the Fourth Proportional to 101,078.63, 139,533.35 and 65,286.09

Step by Step Solution

1. Step 1: Write the proportion equation
   101,078.63 : 139,533.35 = 65,286.09 : x
2. Step 2: Convert to fraction form
   101,078.63/139,533.35 = 65,286.09/x
3. Step 3: Cross multiply
   101,078.63x = 139,533.35 × 65,286.09
4. Step 4: Simplify right side
   101,078.63x = 9,109,586,519.67
5. Step 5: Solve for x
   x = 9,109,586,519.67/101,078.63
6. Step 6: Final answer
   x = 90,123.77