Finding the Fourth Proportional to 2,186.50, 3,279.42 and 725.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.50 : 3,279.42 = 725.47 : x
2. Step 2: Convert to fraction form
   2,186.50/3,279.42 = 725.47/x
3. Step 3: Cross multiply
   2,186.50x = 3,279.42 × 725.47
4. Step 4: Simplify right side
   2,186.50x = 2,379,120.83
5. Step 5: Solve for x
   x = 2,379,120.83/2,186.50
6. Step 6: Final answer
   x = 1,088.10