Finding the Fourth Proportional to 2,662.79, 3,994.59 and 931.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.79 : 3,994.59 = 931.01 : x
2. Step 2: Convert to fraction form
   2,662.79/3,994.59 = 931.01/x
3. Step 3: Cross multiply
   2,662.79x = 3,994.59 × 931.01
4. Step 4: Simplify right side
   2,662.79x = 3,719,003.24
5. Step 5: Solve for x
   x = 3,719,003.24/2,662.79
6. Step 6: Final answer
   x = 1,396.66