Finding the Fourth Proportional to 72,586, 108,885.88 and 28,216.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,586 : 108,885.88 = 28,216.16 : x
2. Step 2: Convert to fraction form
   72,586/108,885.88 = 28,216.16/x
3. Step 3: Cross multiply
   72,586x = 108,885.88 × 28,216.16
4. Step 4: Simplify right side
   72,586x = 3,072,341,411.82
5. Step 5: Solve for x
   x = 3,072,341,411.82/72,586
6. Step 6: Final answer
   x = 42,326.91