Finding the Fourth Proportional to 72,828.56, 109,320.60 and 31,304.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,828.56 : 109,320.60 = 31,304.72 : x
2. Step 2: Convert to fraction form
   72,828.56/109,320.60 = 31,304.72/x
3. Step 3: Cross multiply
   72,828.56x = 109,320.60 × 31,304.72
4. Step 4: Simplify right side
   72,828.56x = 3,422,250,773.23
5. Step 5: Solve for x
   x = 3,422,250,773.23/72,828.56
6. Step 6: Final answer
   x = 46,990.50