Finding the Fourth Proportional to 72,864.72, 109,275.48 and 31,302

Step by Step Solution

1. Step 1: Write the proportion equation
   72,864.72 : 109,275.48 = 31,302 : x
2. Step 2: Convert to fraction form
   72,864.72/109,275.48 = 31,302/x
3. Step 3: Cross multiply
   72,864.72x = 109,275.48 × 31,302
4. Step 4: Simplify right side
   72,864.72x = 3,420,541,074.96
5. Step 5: Solve for x
   x = 3,420,541,074.96/72,864.72
6. Step 6: Final answer
   x = 46,943.72