Finding the Fourth Proportional to 2,490.53, 3,736.06 and 931.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.53 : 3,736.06 = 931.28 : x
2. Step 2: Convert to fraction form
   2,490.53/3,736.06 = 931.28/x
3. Step 3: Cross multiply
   2,490.53x = 3,736.06 × 931.28
4. Step 4: Simplify right side
   2,490.53x = 3,479,296.95
5. Step 5: Solve for x
   x = 3,479,296.95/2,490.53
6. Step 6: Final answer
   x = 1,397.01