Finding the Fourth Proportional to 72,020.48, 99,388.04 and 40,189.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,020.48 : 99,388.04 = 40,189.04 : x
2. Step 2: Convert to fraction form
   72,020.48/99,388.04 = 40,189.04/x
3. Step 3: Cross multiply
   72,020.48x = 99,388.04 × 40,189.04
4. Step 4: Simplify right side
   72,020.48x = 3,994,309,915.08
5. Step 5: Solve for x
   x = 3,994,309,915.08/72,020.48
6. Step 6: Final answer
   x = 55,460.75