Finding the Fourth Proportional to 111,824.19, 167,514.89 and 72,409.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,824.19 : 167,514.89 = 72,409.05 : x
2. Step 2: Convert to fraction form
   111,824.19/167,514.89 = 72,409.05/x
3. Step 3: Cross multiply
   111,824.19x = 167,514.89 × 72,409.05
4. Step 4: Simplify right side
   111,824.19x = 12,129,593,683.71
5. Step 5: Solve for x
   x = 12,129,593,683.71/111,824.19
6. Step 6: Final answer
   x = 108,470.21