Finding the Fourth Proportional to 2,013.45, 3,019.15 and 1,309.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.45 : 3,019.15 = 1,309.47 : x
2. Step 2: Convert to fraction form
   2,013.45/3,019.15 = 1,309.47/x
3. Step 3: Cross multiply
   2,013.45x = 3,019.15 × 1,309.47
4. Step 4: Simplify right side
   2,013.45x = 3,953,486.35
5. Step 5: Solve for x
   x = 3,953,486.35/2,013.45
6. Step 6: Final answer
   x = 1,963.54