Finding the Fourth Proportional to 72,561.42, 108,821.52 and 28,178.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,561.42 : 108,821.52 = 28,178.70 : x
2. Step 2: Convert to fraction form
   72,561.42/108,821.52 = 28,178.70/x
3. Step 3: Cross multiply
   72,561.42x = 108,821.52 × 28,178.70
4. Step 4: Simplify right side
   72,561.42x = 3,066,448,965.62
5. Step 5: Solve for x
   x = 3,066,448,965.62/72,561.42
6. Step 6: Final answer
   x = 42,260.05