Finding the Fourth Proportional to 111,972.42, 154,542.06 and 64,241.55

Step by Step Solution

1. Step 1: Write the proportion equation
   111,972.42 : 154,542.06 = 64,241.55 : x
2. Step 2: Convert to fraction form
   111,972.42/154,542.06 = 64,241.55/x
3. Step 3: Cross multiply
   111,972.42x = 154,542.06 × 64,241.55
4. Step 4: Simplify right side
   111,972.42x = 9,928,021,474.59
5. Step 5: Solve for x
   x = 9,928,021,474.59/111,972.42
6. Step 6: Final answer
   x = 88,664.88