Finding the Fourth Proportional to 42,504.01, 63,769.82 and 20,319.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,504.01 : 63,769.82 = 20,319.05 : x
2. Step 2: Convert to fraction form
   42,504.01/63,769.82 = 20,319.05/x
3. Step 3: Cross multiply
   42,504.01x = 63,769.82 × 20,319.05
4. Step 4: Simplify right side
   42,504.01x = 1,295,742,218.90
5. Step 5: Solve for x
   x = 1,295,742,218.90/42,504.01
6. Step 6: Final answer
   x = 30,485.18