Finding the Fourth Proportional to 2,181.59, 3,010.53 and 1,186.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.59 : 3,010.53 = 1,186.91 : x
2. Step 2: Convert to fraction form
   2,181.59/3,010.53 = 1,186.91/x
3. Step 3: Cross multiply
   2,181.59x = 3,010.53 × 1,186.91
4. Step 4: Simplify right side
   2,181.59x = 3,573,228.16
5. Step 5: Solve for x
   x = 3,573,228.16/2,181.59
6. Step 6: Final answer
   x = 1,637.90