Finding the Fourth Proportional to 42,481.04, 63,719.12 and 20,309.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,481.04 : 63,719.12 = 20,309.72 : x
2. Step 2: Convert to fraction form
   42,481.04/63,719.12 = 20,309.72/x
3. Step 3: Cross multiply
   42,481.04x = 63,719.12 × 20,309.72
4. Step 4: Simplify right side
   42,481.04x = 1,294,117,485.85
5. Step 5: Solve for x
   x = 1,294,117,485.85/42,481.04
6. Step 6: Final answer
   x = 30,463.41