Finding the Fourth Proportional to 101,091.72, 139,478.58 and 65,283.24

Step by Step Solution

1. Step 1: Write the proportion equation
   101,091.72 : 139,478.58 = 65,283.24 : x
2. Step 2: Convert to fraction form
   101,091.72/139,478.58 = 65,283.24/x
3. Step 3: Cross multiply
   101,091.72x = 139,478.58 × 65,283.24
4. Step 4: Simplify right side
   101,091.72x = 9,105,613,613.00
5. Step 5: Solve for x
   x = 9,105,613,613.00/101,091.72
6. Step 6: Final answer
   x = 90,072.79