Finding the Fourth Proportional to 2,180.99, 3,009.80 and 1,186.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.99 : 3,009.80 = 1,186.29 : x
2. Step 2: Convert to fraction form
   2,180.99/3,009.80 = 1,186.29/x
3. Step 3: Cross multiply
   2,180.99x = 3,009.80 × 1,186.29
4. Step 4: Simplify right side
   2,180.99x = 3,570,498.61
5. Step 5: Solve for x
   x = 3,570,498.61/2,180.99
6. Step 6: Final answer
   x = 1,637.10