Finding the Fourth Proportional to 111,815.94, 167,502.51 and 72,400.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,815.94 : 167,502.51 = 72,400.80 : x
2. Step 2: Convert to fraction form
   111,815.94/167,502.51 = 72,400.80/x
3. Step 3: Cross multiply
   111,815.94x = 167,502.51 × 72,400.80
4. Step 4: Simplify right side
   111,815.94x = 12,127,315,726.01
5. Step 5: Solve for x
   x = 12,127,315,726.01/111,815.94
6. Step 6: Final answer
   x = 108,457.84