Finding the Fourth Proportional to 111,138.54, 153,361.47 and 65,808.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111,138.54 : 153,361.47 = 65,808.42 : x
2. Step 2: Convert to fraction form
   111,138.54/153,361.47 = 65,808.42/x
3. Step 3: Cross multiply
   111,138.54x = 153,361.47 × 65,808.42
4. Step 4: Simplify right side
   111,138.54x = 10,092,476,029.58
5. Step 5: Solve for x
   x = 10,092,476,029.58/111,138.54
6. Step 6: Final answer
   x = 90,809.87