Finding the Fourth Proportional to 1,384.64, 1,908.24 and 942.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.64 : 1,908.24 = 942.56 : x
2. Step 2: Convert to fraction form
   1,384.64/1,908.24 = 942.56/x
3. Step 3: Cross multiply
   1,384.64x = 1,908.24 × 942.56
4. Step 4: Simplify right side
   1,384.64x = 1,798,630.69
5. Step 5: Solve for x
   x = 1,798,630.69/1,384.64
6. Step 6: Final answer
   x = 1,298.99