Finding the Fourth Proportional to 1,111.04, 1,667.33 and 720.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.04 : 1,667.33 = 720.07 : x
2. Step 2: Convert to fraction form
   1,111.04/1,667.33 = 720.07/x
3. Step 3: Cross multiply
   1,111.04x = 1,667.33 × 720.07
4. Step 4: Simplify right side
   1,111.04x = 1,200,594.31
5. Step 5: Solve for x
   x = 1,200,594.31/1,111.04
6. Step 6: Final answer
   x = 1,080.60