Finding the Fourth Proportional to 72,949.41, 109,458.14 and 71,770.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,949.41 : 109,458.14 = 71,770.05 : x
2. Step 2: Convert to fraction form
   72,949.41/109,458.14 = 71,770.05/x
3. Step 3: Cross multiply
   72,949.41x = 109,458.14 × 71,770.05
4. Step 4: Simplify right side
   72,949.41x = 7,855,815,821.86
5. Step 5: Solve for x
   x = 7,855,815,821.86/72,949.41
6. Step 6: Final answer
   x = 107,688.55