Finding the Fourth Proportional to 1,384.24, 1,909.94 and 1,011.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.24 : 1,909.94 = 1,011.42 : x
2. Step 2: Convert to fraction form
   1,384.24/1,909.94 = 1,011.42/x
3. Step 3: Cross multiply
   1,384.24x = 1,909.94 × 1,011.42
4. Step 4: Simplify right side
   1,384.24x = 1,931,751.51
5. Step 5: Solve for x
   x = 1,931,751.51/1,384.24
6. Step 6: Final answer
   x = 1,395.53