Finding the Fourth Proportional to 2,699.16, 4,042.20 and 1,309.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,699.16 : 4,042.20 = 1,309.05 : x
2. Step 2: Convert to fraction form
   2,699.16/4,042.20 = 1,309.05/x
3. Step 3: Cross multiply
   2,699.16x = 4,042.20 × 1,309.05
4. Step 4: Simplify right side
   2,699.16x = 5,291,446.82
5. Step 5: Solve for x
   x = 5,291,446.82/2,699.16
6. Step 6: Final answer
   x = 1,960.41