Finding the Fourth Proportional to 72,860.72, 109,269.48 and 31,298

Step by Step Solution

1. Step 1: Write the proportion equation
   72,860.72 : 109,269.48 = 31,298 : x
2. Step 2: Convert to fraction form
   72,860.72/109,269.48 = 31,298/x
3. Step 3: Cross multiply
   72,860.72x = 109,269.48 × 31,298
4. Step 4: Simplify right side
   72,860.72x = 3,419,916,185.04
5. Step 5: Solve for x
   x = 3,419,916,185.04/72,860.72
6. Step 6: Final answer
   x = 46,937.72