Finding the Fourth Proportional to 72,756.66, 109,134.60 and 20,165.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,756.66 : 109,134.60 = 20,165.96 : x
2. Step 2: Convert to fraction form
   72,756.66/109,134.60 = 20,165.96/x
3. Step 3: Cross multiply
   72,756.66x = 109,134.60 × 20,165.96
4. Step 4: Simplify right side
   72,756.66x = 2,200,803,978.22
5. Step 5: Solve for x
   x = 2,200,803,978.22/72,756.66
6. Step 6: Final answer
   x = 30,248.83