Finding the Fourth Proportional to 1,111.41, 1,666.94 and 699.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.41 : 1,666.94 = 699.30 : x
2. Step 2: Convert to fraction form
   1,111.41/1,666.94 = 699.30/x
3. Step 3: Cross multiply
   1,111.41x = 1,666.94 × 699.30
4. Step 4: Simplify right side
   1,111.41x = 1,165,687.65
5. Step 5: Solve for x
   x = 1,165,687.65/1,111.41
6. Step 6: Final answer
   x = 1,048.84