Finding the Fourth Proportional to 111,976.40, 167,770.20 and 72,513.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,976.40 : 167,770.20 = 72,513.20 : x
2. Step 2: Convert to fraction form
   111,976.40/167,770.20 = 72,513.20/x
3. Step 3: Cross multiply
   111,976.40x = 167,770.20 × 72,513.20
4. Step 4: Simplify right side
   111,976.40x = 12,165,554,066.64
5. Step 5: Solve for x
   x = 12,165,554,066.64/111,976.40
6. Step 6: Final answer
   x = 108,643.91