Finding the Fourth Proportional to 1,402.93, 1,936.85 and 931.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.93 : 1,936.85 = 931.47 : x
2. Step 2: Convert to fraction form
   1,402.93/1,936.85 = 931.47/x
3. Step 3: Cross multiply
   1,402.93x = 1,936.85 × 931.47
4. Step 4: Simplify right side
   1,402.93x = 1,804,112.73
5. Step 5: Solve for x
   x = 1,804,112.73/1,402.93
6. Step 6: Final answer
   x = 1,285.96