Finding the Fourth Proportional to 111,972.54, 167,139.57 and 98,686.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111,972.54 : 167,139.57 = 98,686.98 : x
2. Step 2: Convert to fraction form
   111,972.54/167,139.57 = 98,686.98/x
3. Step 3: Cross multiply
   111,972.54x = 167,139.57 × 98,686.98
4. Step 4: Simplify right side
   111,972.54x = 16,494,499,401.80
5. Step 5: Solve for x
   x = 16,494,499,401.80/111,972.54
6. Step 6: Final answer
   x = 147,308.43