Finding the Fourth Proportional to 73,003.01, 109,487.78 and 20,416.21

Step by Step Solution

1. Step 1: Write the proportion equation
   73,003.01 : 109,487.78 = 20,416.21 : x
2. Step 2: Convert to fraction form
   73,003.01/109,487.78 = 20,416.21/x
3. Step 3: Cross multiply
   73,003.01x = 109,487.78 × 20,416.21
4. Step 4: Simplify right side
   73,003.01x = 2,235,325,406.83
5. Step 5: Solve for x
   x = 2,235,325,406.83/73,003.01
6. Step 6: Final answer
   x = 30,619.63