Finding the Fourth Proportional to 101,142.15, 139,542.89 and 65,353.25

Step by Step Solution

1. Step 1: Write the proportion equation
   101,142.15 : 139,542.89 = 65,353.25 : x
2. Step 2: Convert to fraction form
   101,142.15/139,542.89 = 65,353.25/x
3. Step 3: Cross multiply
   101,142.15x = 139,542.89 × 65,353.25
4. Step 4: Simplify right side
   101,142.15x = 9,119,580,351.41
5. Step 5: Solve for x
   x = 9,119,580,351.41/101,142.15
6. Step 6: Final answer
   x = 90,165.97