Finding the Fourth Proportional to 72,617.76, 108,909.63 and 20,031.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,617.76 : 108,909.63 = 20,031.48 : x
2. Step 2: Convert to fraction form
   72,617.76/108,909.63 = 20,031.48/x
3. Step 3: Cross multiply
   72,617.76x = 108,909.63 × 20,031.48
4. Step 4: Simplify right side
   72,617.76x = 2,181,621,075.15
5. Step 5: Solve for x
   x = 2,181,621,075.15/72,617.76
6. Step 6: Final answer
   x = 30,042.53