Finding the Fourth Proportional to 2,490.89, 3,737.77 and 931.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.89 : 3,737.77 = 931.95 : x
2. Step 2: Convert to fraction form
   2,490.89/3,737.77 = 931.95/x
3. Step 3: Cross multiply
   2,490.89x = 3,737.77 × 931.95
4. Step 4: Simplify right side
   2,490.89x = 3,483,412.42
5. Step 5: Solve for x
   x = 3,483,412.42/2,490.89
6. Step 6: Final answer
   x = 1,398.46