Finding the Fourth Proportional to 72,805.98, 109,143.92 and 28,422.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,805.98 : 109,143.92 = 28,422.38 : x
2. Step 2: Convert to fraction form
   72,805.98/109,143.92 = 28,422.38/x
3. Step 3: Cross multiply
   72,805.98x = 109,143.92 × 28,422.38
4. Step 4: Simplify right side
   72,805.98x = 3,102,129,968.93
5. Step 5: Solve for x
   x = 3,102,129,968.93/72,805.98
6. Step 6: Final answer
   x = 42,608.18