Finding the Fourth Proportional to 72,719.56, 108,936.78 and 37,682.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,719.56 : 108,936.78 = 37,682.20 : x
2. Step 2: Convert to fraction form
   72,719.56/108,936.78 = 37,682.20/x
3. Step 3: Cross multiply
   72,719.56x = 108,936.78 × 37,682.20
4. Step 4: Simplify right side
   72,719.56x = 4,104,977,531.32
5. Step 5: Solve for x
   x = 4,104,977,531.32/72,719.56
6. Step 6: Final answer
   x = 56,449.43