Finding the Fourth Proportional to 108,054.16, 148,936.26 and 72,231.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,054.16 : 148,936.26 = 72,231.10 : x
2. Step 2: Convert to fraction form
   108,054.16/148,936.26 = 72,231.10/x
3. Step 3: Cross multiply
   108,054.16x = 148,936.26 × 72,231.10
4. Step 4: Simplify right side
   108,054.16x = 10,757,829,889.69
5. Step 5: Solve for x
   x = 10,757,829,889.69/108,054.16
6. Step 6: Final answer
   x = 99,559.61