Finding the Fourth Proportional to 101,061.15, 139,385.66 and 65,259.96

Step by Step Solution

1. Step 1: Write the proportion equation
   101,061.15 : 139,385.66 = 65,259.96 : x
2. Step 2: Convert to fraction form
   101,061.15/139,385.66 = 65,259.96/x
3. Step 3: Cross multiply
   101,061.15x = 139,385.66 × 65,259.96
4. Step 4: Simplify right side
   101,061.15x = 9,096,302,269.87
5. Step 5: Solve for x
   x = 9,096,302,269.87/101,061.15
6. Step 6: Final answer
   x = 90,007.90