Finding the Fourth Proportional to 2,309.90, 3,186.69 and 1,470.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.90 : 3,186.69 = 1,470.56 : x
2. Step 2: Convert to fraction form
   2,309.90/3,186.69 = 1,470.56/x
3. Step 3: Cross multiply
   2,309.90x = 3,186.69 × 1,470.56
4. Step 4: Simplify right side
   2,309.90x = 4,686,218.85
5. Step 5: Solve for x
   x = 4,686,218.85/2,309.90
6. Step 6: Final answer
   x = 2,028.75