Finding the Fourth Proportional to 1,424.48, 1,964.12 and 1,004.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.48 : 1,964.12 = 1,004.90 : x
2. Step 2: Convert to fraction form
   1,424.48/1,964.12 = 1,004.90/x
3. Step 3: Cross multiply
   1,424.48x = 1,964.12 × 1,004.90
4. Step 4: Simplify right side
   1,424.48x = 1,973,729.34
5. Step 5: Solve for x
   x = 1,973,729.34/1,424.48
6. Step 6: Final answer
   x = 1,385.58