Finding the Fourth Proportional to 72,891.01, 109,342.78 and 20,300.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72,891.01 : 109,342.78 = 20,300.49 : x
2. Step 2: Convert to fraction form
   72,891.01/109,342.78 = 20,300.49/x
3. Step 3: Cross multiply
   72,891.01x = 109,342.78 × 20,300.49
4. Step 4: Simplify right side
   72,891.01x = 2,219,711,910.46
5. Step 5: Solve for x
   x = 2,219,711,910.46/72,891.01
6. Step 6: Final answer
   x = 30,452.48