Finding the Fourth Proportional to 72,770.19, 109,150.83 and 42,801

Step by Step Solution

1. Step 1: Write the proportion equation
   72,770.19 : 109,150.83 = 42,801 : x
2. Step 2: Convert to fraction form
   72,770.19/109,150.83 = 42,801/x
3. Step 3: Cross multiply
   72,770.19x = 109,150.83 × 42,801
4. Step 4: Simplify right side
   72,770.19x = 4,671,764,674.83
5. Step 5: Solve for x
   x = 4,671,764,674.83/72,770.19
6. Step 6: Final answer
   x = 64,198.88