Finding the Fourth Proportional to 72,909.52, 109,379.53 and 30,789.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,909.52 : 109,379.53 = 30,789.70 : x
2. Step 2: Convert to fraction form
   72,909.52/109,379.53 = 30,789.70/x
3. Step 3: Cross multiply
   72,909.52x = 109,379.53 × 30,789.70
4. Step 4: Simplify right side
   72,909.52x = 3,367,762,367.94
5. Step 5: Solve for x
   x = 3,367,762,367.94/72,909.52
6. Step 6: Final answer
   x = 46,190.99