Finding the Fourth Proportional to 1,618.86, 2,429.20 and 694.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.86 : 2,429.20 = 694.34 : x
2. Step 2: Convert to fraction form
   1,618.86/2,429.20 = 694.34/x
3. Step 3: Cross multiply
   1,618.86x = 2,429.20 × 694.34
4. Step 4: Simplify right side
   1,618.86x = 1,686,690.73
5. Step 5: Solve for x
   x = 1,686,690.73/1,618.86
6. Step 6: Final answer
   x = 1,041.90