Finding the Fourth Proportional to 72,575.96, 108,847.38 and 19,990.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,575.96 : 108,847.38 = 19,990.04 : x
2. Step 2: Convert to fraction form
   72,575.96/108,847.38 = 19,990.04/x
3. Step 3: Cross multiply
   72,575.96x = 108,847.38 × 19,990.04
4. Step 4: Simplify right side
   72,575.96x = 2,175,863,480.10
5. Step 5: Solve for x
   x = 2,175,863,480.10/72,575.96
6. Step 6: Final answer
   x = 29,980.50