Finding the Fourth Proportional to 8,572.50, 12,858.72 and 2,729.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,572.50 : 12,858.72 = 2,729.58 : x
2. Step 2: Convert to fraction form
   8,572.50/12,858.72 = 2,729.58/x
3. Step 3: Cross multiply
   8,572.50x = 12,858.72 × 2,729.58
4. Step 4: Simplify right side
   8,572.50x = 35,098,904.94
5. Step 5: Solve for x
   x = 35,098,904.94/8,572.50
6. Step 6: Final answer
   x = 4,094.36