Finding the Fourth Proportional to 1,415.83, 1,936.49 and 1,393.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.83 : 1,936.49 = 1,393.15 : x
2. Step 2: Convert to fraction form
   1,415.83/1,936.49 = 1,393.15/x
3. Step 3: Cross multiply
   1,415.83x = 1,936.49 × 1,393.15
4. Step 4: Simplify right side
   1,415.83x = 2,697,821.04
5. Step 5: Solve for x
   x = 2,697,821.04/1,415.83
6. Step 6: Final answer
   x = 1,905.47