Finding the Fourth Proportional to 101,113.65, 139,581.54 and 65,321.10

Step by Step Solution

1. Step 1: Write the proportion equation
   101,113.65 : 139,581.54 = 65,321.10 : x
2. Step 2: Convert to fraction form
   101,113.65/139,581.54 = 65,321.10/x
3. Step 3: Cross multiply
   101,113.65x = 139,581.54 × 65,321.10
4. Step 4: Simplify right side
   101,113.65x = 9,117,619,732.49
5. Step 5: Solve for x
   x = 9,117,619,732.49/101,113.65
6. Step 6: Final answer
   x = 90,172.00