Finding the Fourth Proportional to 2,093.30, 3,139.85 and 777.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,093.30 : 3,139.85 = 777.31 : x
2. Step 2: Convert to fraction form
   2,093.30/3,139.85 = 777.31/x
3. Step 3: Cross multiply
   2,093.30x = 3,139.85 × 777.31
4. Step 4: Simplify right side
   2,093.30x = 2,440,646.60
5. Step 5: Solve for x
   x = 2,440,646.60/2,093.30
6. Step 6: Final answer
   x = 1,165.93