Finding the Fourth Proportional to 101,508.28, 140,078.56 and 56,185.12

Step by Step Solution

1. Step 1: Write the proportion equation
   101,508.28 : 140,078.56 = 56,185.12 : x
2. Step 2: Convert to fraction form
   101,508.28/140,078.56 = 56,185.12/x
3. Step 3: Cross multiply
   101,508.28x = 140,078.56 × 56,185.12
4. Step 4: Simplify right side
   101,508.28x = 7,870,330,703.03
5. Step 5: Solve for x
   x = 7,870,330,703.03/101,508.28
6. Step 6: Final answer
   x = 77,533.88