Finding the Fourth Proportional to 2,144.61, 3,213.86 and 1,267.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.61 : 3,213.86 = 1,267.29 : x
2. Step 2: Convert to fraction form
   2,144.61/3,213.86 = 1,267.29/x
3. Step 3: Cross multiply
   2,144.61x = 3,213.86 × 1,267.29
4. Step 4: Simplify right side
   2,144.61x = 4,072,886.30
5. Step 5: Solve for x
   x = 4,072,886.30/2,144.61
6. Step 6: Final answer
   x = 1,899.13