Finding the Fourth Proportional to 1,381.57, 1,906.88 and 940.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.57 : 1,906.88 = 940.52 : x
2. Step 2: Convert to fraction form
   1,381.57/1,906.88 = 940.52/x
3. Step 3: Cross multiply
   1,381.57x = 1,906.88 × 940.52
4. Step 4: Simplify right side
   1,381.57x = 1,793,458.84
5. Step 5: Solve for x
   x = 1,793,458.84/1,381.57
6. Step 6: Final answer
   x = 1,298.13