Finding the Fourth Proportional to 2,624.56, 3,937.20 and 892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.56 : 3,937.20 = 892.72 : x
2. Step 2: Convert to fraction form
   2,624.56/3,937.20 = 892.72/x
3. Step 3: Cross multiply
   2,624.56x = 3,937.20 × 892.72
4. Step 4: Simplify right side
   2,624.56x = 3,514,817.18
5. Step 5: Solve for x
   x = 3,514,817.18/2,624.56
6. Step 6: Final answer
   x = 1,339.20