Finding the Fourth Proportional to 72,859.72, 109,267.98 and 31,297

Step by Step Solution

1. Step 1: Write the proportion equation
   72,859.72 : 109,267.98 = 31,297 : x
2. Step 2: Convert to fraction form
   72,859.72/109,267.98 = 31,297/x
3. Step 3: Cross multiply
   72,859.72x = 109,267.98 × 31,297
4. Step 4: Simplify right side
   72,859.72x = 3,419,759,970.06
5. Step 5: Solve for x
   x = 3,419,759,970.06/72,859.72
6. Step 6: Final answer
   x = 46,936.22