Finding the Fourth Proportional to 2,779.86, 4,168.62 and 930.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,779.86 : 4,168.62 = 930.51 : x
2. Step 2: Convert to fraction form
   2,779.86/4,168.62 = 930.51/x
3. Step 3: Cross multiply
   2,779.86x = 4,168.62 × 930.51
4. Step 4: Simplify right side
   2,779.86x = 3,878,942.60
5. Step 5: Solve for x
   x = 3,878,942.60/2,779.86
6. Step 6: Final answer
   x = 1,395.37