Finding the Fourth Proportional to 1,384.30, 1,908.78 and 942.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.30 : 1,908.78 = 942.46 : x
2. Step 2: Convert to fraction form
   1,384.30/1,908.78 = 942.46/x
3. Step 3: Cross multiply
   1,384.30x = 1,908.78 × 942.46
4. Step 4: Simplify right side
   1,384.30x = 1,798,948.80
5. Step 5: Solve for x
   x = 1,798,948.80/1,384.30
6. Step 6: Final answer
   x = 1,299.54