Finding the Fourth Proportional to 1,426.01, 2,139 and 452.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.01 : 2,139 = 452.09 : x
2. Step 2: Convert to fraction form
   1,426.01/2,139 = 452.09/x
3. Step 3: Cross multiply
   1,426.01x = 2,139 × 452.09
4. Step 4: Simplify right side
   1,426.01x = 967,009.82
5. Step 5: Solve for x
   x = 967,009.82/1,426.01
6. Step 6: Final answer
   x = 678.12