Finding the Fourth Proportional to 72,580.98, 108,878.37 and 28,211.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,580.98 : 108,878.37 = 28,211.16 : x
2. Step 2: Convert to fraction form
   72,580.98/108,878.37 = 28,211.16/x
3. Step 3: Cross multiply
   72,580.98x = 108,878.37 × 28,211.16
4. Step 4: Simplify right side
   72,580.98x = 3,071,585,116.61
5. Step 5: Solve for x
   x = 3,071,585,116.61/72,580.98
6. Step 6: Final answer
   x = 42,319.42