Finding the Fourth Proportional to 111,528.58, 153,839.25 and 66,174.37

Step by Step Solution

1. Step 1: Write the proportion equation
   111,528.58 : 153,839.25 = 66,174.37 : x
2. Step 2: Convert to fraction form
   111,528.58/153,839.25 = 66,174.37/x
3. Step 3: Cross multiply
   111,528.58x = 153,839.25 × 66,174.37
4. Step 4: Simplify right side
   111,528.58x = 10,180,215,065.42
5. Step 5: Solve for x
   x = 10,180,215,065.42/111,528.58
6. Step 6: Final answer
   x = 91,278.98