Finding the Fourth Proportional to 1,393.45, 1,922.03 and 1,165.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.45 : 1,922.03 = 1,165.69 : x
2. Step 2: Convert to fraction form
   1,393.45/1,922.03 = 1,165.69/x
3. Step 3: Cross multiply
   1,393.45x = 1,922.03 × 1,165.69
4. Step 4: Simplify right side
   1,393.45x = 2,240,492.10
5. Step 5: Solve for x
   x = 2,240,492.10/1,393.45
6. Step 6: Final answer
   x = 1,607.87