Finding the Fourth Proportional to 111,806.30, 167,272.05 and 72,440.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,806.30 : 167,272.05 = 72,440.30 : x
2. Step 2: Convert to fraction form
   111,806.30/167,272.05 = 72,440.30/x
3. Step 3: Cross multiply
   111,806.30x = 167,272.05 × 72,440.30
4. Step 4: Simplify right side
   111,806.30x = 12,117,237,483.62
5. Step 5: Solve for x
   x = 12,117,237,483.62/111,806.30
6. Step 6: Final answer
   x = 108,377.05