Finding the Fourth Proportional to 72,820.10, 109,242.60 and 33,380.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,820.10 : 109,242.60 = 33,380.60 : x
2. Step 2: Convert to fraction form
   72,820.10/109,242.60 = 33,380.60/x
3. Step 3: Cross multiply
   72,820.10x = 109,242.60 × 33,380.60
4. Step 4: Simplify right side
   72,820.10x = 3,646,582,987.35
5. Step 5: Solve for x
   x = 3,646,582,987.35/72,820.10
6. Step 6: Final answer
   x = 50,076.60