Finding the Fourth Proportional to 2,131.67, 2,941.71 and 1,200.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.67 : 2,941.71 = 1,200.17 : x
2. Step 2: Convert to fraction form
   2,131.67/2,941.71 = 1,200.17/x
3. Step 3: Cross multiply
   2,131.67x = 2,941.71 × 1,200.17
4. Step 4: Simplify right side
   2,131.67x = 3,530,552.09
5. Step 5: Solve for x
   x = 3,530,552.09/2,131.67
6. Step 6: Final answer
   x = 1,656.24