Finding the Fourth Proportional to 2,099.93, 3,148.81 and 618.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.93 : 3,148.81 = 618.96 : x
2. Step 2: Convert to fraction form
   2,099.93/3,148.81 = 618.96/x
3. Step 3: Cross multiply
   2,099.93x = 3,148.81 × 618.96
4. Step 4: Simplify right side
   2,099.93x = 1,948,985.89
5. Step 5: Solve for x
   x = 1,948,985.89/2,099.93
6. Step 6: Final answer
   x = 928.12