Finding the Fourth Proportional to 2,131.64, 2,941.60 and 1,200.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.64 : 2,941.60 = 1,200.12 : x
2. Step 2: Convert to fraction form
   2,131.64/2,941.60 = 1,200.12/x
3. Step 3: Cross multiply
   2,131.64x = 2,941.60 × 1,200.12
4. Step 4: Simplify right side
   2,131.64x = 3,530,272.99
5. Step 5: Solve for x
   x = 3,530,272.99/2,131.64
6. Step 6: Final answer
   x = 1,656.13