Finding the Fourth Proportional to 42,571.72, 63,853.56 and 20,077.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,571.72 : 63,853.56 = 20,077.18 : x
2. Step 2: Convert to fraction form
   42,571.72/63,853.56 = 20,077.18/x
3. Step 3: Cross multiply
   42,571.72x = 63,853.56 × 20,077.18
4. Step 4: Simplify right side
   42,571.72x = 1,281,999,417.76
5. Step 5: Solve for x
   x = 1,281,999,417.76/42,571.72
6. Step 6: Final answer
   x = 30,113.87