Finding the Fourth Proportional to 72,810.77, 109,216.71 and 20,224.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,810.77 : 109,216.71 = 20,224.35 : x
2. Step 2: Convert to fraction form
   72,810.77/109,216.71 = 20,224.35/x
3. Step 3: Cross multiply
   72,810.77x = 109,216.71 × 20,224.35
4. Step 4: Simplify right side
   72,810.77x = 2,208,836,968.89
5. Step 5: Solve for x
   x = 2,208,836,968.89/72,810.77
6. Step 6: Final answer
   x = 30,336.68