Finding the Fourth Proportional to 1,111.25, 1,667.26 and 699.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.25 : 1,667.26 = 699.92 : x
2. Step 2: Convert to fraction form
   1,111.25/1,667.26 = 699.92/x
3. Step 3: Cross multiply
   1,111.25x = 1,667.26 × 699.92
4. Step 4: Simplify right side
   1,111.25x = 1,166,948.62
5. Step 5: Solve for x
   x = 1,166,948.62/1,111.25
6. Step 6: Final answer
   x = 1,050.12