Finding the Fourth Proportional to 2,129.98, 2,939.34 and 1,185.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.98 : 2,939.34 = 1,185.82 : x
2. Step 2: Convert to fraction form
   2,129.98/2,939.34 = 1,185.82/x
3. Step 3: Cross multiply
   2,129.98x = 2,939.34 × 1,185.82
4. Step 4: Simplify right side
   2,129.98x = 3,485,528.16
5. Step 5: Solve for x
   x = 3,485,528.16/2,129.98
6. Step 6: Final answer
   x = 1,636.41