Finding the Fourth Proportional to 1,434.21, 1,981.41 and 1,226.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.21 : 1,981.41 = 1,226.55 : x
2. Step 2: Convert to fraction form
   1,434.21/1,981.41 = 1,226.55/x
3. Step 3: Cross multiply
   1,434.21x = 1,981.41 × 1,226.55
4. Step 4: Simplify right side
   1,434.21x = 2,430,298.44
5. Step 5: Solve for x
   x = 2,430,298.44/1,434.21
6. Step 6: Final answer
   x = 1,694.52