Finding the Fourth Proportional to 1,431.86, 2,144.16 and 1,200.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.86 : 2,144.16 = 1,200.14 : x
2. Step 2: Convert to fraction form
   1,431.86/2,144.16 = 1,200.14/x
3. Step 3: Cross multiply
   1,431.86x = 2,144.16 × 1,200.14
4. Step 4: Simplify right side
   1,431.86x = 2,573,292.18
5. Step 5: Solve for x
   x = 2,573,292.18/1,431.86
6. Step 6: Final answer
   x = 1,797.17