Finding the Fourth Proportional to 1,385.35, 1,908.89 and 942.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.35 : 1,908.89 = 942.48 : x
2. Step 2: Convert to fraction form
   1,385.35/1,908.89 = 942.48/x
3. Step 3: Cross multiply
   1,385.35x = 1,908.89 × 942.48
4. Step 4: Simplify right side
   1,385.35x = 1,799,090.65
5. Step 5: Solve for x
   x = 1,799,090.65/1,385.35
6. Step 6: Final answer
   x = 1,298.65