Finding the Fourth Proportional to 72,853.72, 109,258.98 and 31,291

Step by Step Solution

1. Step 1: Write the proportion equation
   72,853.72 : 109,258.98 = 31,291 : x
2. Step 2: Convert to fraction form
   72,853.72/109,258.98 = 31,291/x
3. Step 3: Cross multiply
   72,853.72x = 109,258.98 × 31,291
4. Step 4: Simplify right side
   72,853.72x = 3,418,822,743.18
5. Step 5: Solve for x
   x = 3,418,822,743.18/72,853.72
6. Step 6: Final answer
   x = 46,927.22