Finding the Fourth Proportional to 2,372.10, 3,558.72 and 728.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,372.10 : 3,558.72 = 728.55 : x
2. Step 2: Convert to fraction form
   2,372.10/3,558.72 = 728.55/x
3. Step 3: Cross multiply
   2,372.10x = 3,558.72 × 728.55
4. Step 4: Simplify right side
   2,372.10x = 2,592,705.46
5. Step 5: Solve for x
   x = 2,592,705.46/2,372.10
6. Step 6: Final answer
   x = 1,093.00