Finding the Fourth Proportional to 1,426.41, 2,139.98 and 452.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.41 : 2,139.98 = 452.52 : x
2. Step 2: Convert to fraction form
   1,426.41/2,139.98 = 452.52/x
3. Step 3: Cross multiply
   1,426.41x = 2,139.98 × 452.52
4. Step 4: Simplify right side
   1,426.41x = 968,381.49
5. Step 5: Solve for x
   x = 968,381.49/1,426.41
6. Step 6: Final answer
   x = 678.89