Finding the Fourth Proportional to 111,411.62, 153,767.69 and 66,114.58

Step by Step Solution

1. Step 1: Write the proportion equation
   111,411.62 : 153,767.69 = 66,114.58 : x
2. Step 2: Convert to fraction form
   111,411.62/153,767.69 = 66,114.58/x
3. Step 3: Cross multiply
   111,411.62x = 153,767.69 × 66,114.58
4. Step 4: Simplify right side
   111,411.62x = 10,166,286,241.92
5. Step 5: Solve for x
   x = 10,166,286,241.92/111,411.62
6. Step 6: Final answer
   x = 91,249.78