Finding the Fourth Proportional to 72,590.72, 108,886.68 and 20,003.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,590.72 : 108,886.68 = 20,003.09 : x
2. Step 2: Convert to fraction form
   72,590.72/108,886.68 = 20,003.09/x
3. Step 3: Cross multiply
   72,590.72x = 108,886.68 × 20,003.09
4. Step 4: Simplify right side
   72,590.72x = 2,178,069,515.41
5. Step 5: Solve for x
   x = 2,178,069,515.41/72,590.72
6. Step 6: Final answer
   x = 30,004.79