Finding the Fourth Proportional to 2,515.17, 3,470.64 and 1,396.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.17 : 3,470.64 = 1,396.00 : x
2. Step 2: Convert to fraction form
   2,515.17/3,470.64 = 1,396.00/x
3. Step 3: Cross multiply
   2,515.17x = 3,470.64 × 1,396.00
4. Step 4: Simplify right side
   2,515.17x = 4,844,996.09
5. Step 5: Solve for x
   x = 4,844,996.09/2,515.17
6. Step 6: Final answer
   x = 1,926.31