Finding the Fourth Proportional to 2,662.88, 3,994.36 and 931.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.88 : 3,994.36 = 931.52 : x
2. Step 2: Convert to fraction form
   2,662.88/3,994.36 = 931.52/x
3. Step 3: Cross multiply
   2,662.88x = 3,994.36 × 931.52
4. Step 4: Simplify right side
   2,662.88x = 3,720,826.23
5. Step 5: Solve for x
   x = 3,720,826.23/2,662.88
6. Step 6: Final answer
   x = 1,397.29