Finding the Fourth Proportional to 2,181.45, 3,010.39 and 1,186.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.45 : 3,010.39 = 1,186.72 : x
2. Step 2: Convert to fraction form
   2,181.45/3,010.39 = 1,186.72/x
3. Step 3: Cross multiply
   2,181.45x = 3,010.39 × 1,186.72
4. Step 4: Simplify right side
   2,181.45x = 3,572,479.53
5. Step 5: Solve for x
   x = 3,572,479.53/2,181.45
6. Step 6: Final answer
   x = 1,637.66