Finding the Fourth Proportional to 1,262.06, 1,892.55 and 440.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.06 : 1,892.55 = 440.09 : x
2. Step 2: Convert to fraction form
   1,262.06/1,892.55 = 440.09/x
3. Step 3: Cross multiply
   1,262.06x = 1,892.55 × 440.09
4. Step 4: Simplify right side
   1,262.06x = 832,892.33
5. Step 5: Solve for x
   x = 832,892.33/1,262.06
6. Step 6: Final answer
   x = 659.95