Finding the Fourth Proportional to 1,435.46, 2,153.34 and 1,272.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.46 : 2,153.34 = 1,272.47 : x
2. Step 2: Convert to fraction form
   1,435.46/2,153.34 = 1,272.47/x
3. Step 3: Cross multiply
   1,435.46x = 2,153.34 × 1,272.47
4. Step 4: Simplify right side
   1,435.46x = 2,740,049.78
5. Step 5: Solve for x
   x = 2,740,049.78/1,435.46
6. Step 6: Final answer
   x = 1,908.84