Finding the Fourth Proportional to 1,426.41, 2,139.62 and 452.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.41 : 2,139.62 = 452.59 : x
2. Step 2: Convert to fraction form
   1,426.41/2,139.62 = 452.59/x
3. Step 3: Cross multiply
   1,426.41x = 2,139.62 × 452.59
4. Step 4: Simplify right side
   1,426.41x = 968,363.00
5. Step 5: Solve for x
   x = 968,363.00/1,426.41
6. Step 6: Final answer
   x = 678.88