Finding the Fourth Proportional to 111,936.49, 154,468.79 and 66,604.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,936.49 : 154,468.79 = 66,604.10 : x
2. Step 2: Convert to fraction form
   111,936.49/154,468.79 = 66,604.10/x
3. Step 3: Cross multiply
   111,936.49x = 154,468.79 × 66,604.10
4. Step 4: Simplify right side
   111,936.49x = 10,288,254,736.04
5. Step 5: Solve for x
   x = 10,288,254,736.04/111,936.49
6. Step 6: Final answer
   x = 91,911.54