Finding the Fourth Proportional to 1,009.90, 1,392.42 and 760.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.90 : 1,392.42 = 760.42 : x
2. Step 2: Convert to fraction form
   1,009.90/1,392.42 = 760.42/x
3. Step 3: Cross multiply
   1,009.90x = 1,392.42 × 760.42
4. Step 4: Simplify right side
   1,009.90x = 1,058,824.02
5. Step 5: Solve for x
   x = 1,058,824.02/1,009.90
6. Step 6: Final answer
   x = 1,048.44