Finding the Fourth Proportional to 1,667.21, 2,499.75 and 716.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.21 : 2,499.75 = 716.22 : x
2. Step 2: Convert to fraction form
   1,667.21/2,499.75 = 716.22/x
3. Step 3: Cross multiply
   1,667.21x = 2,499.75 × 716.22
4. Step 4: Simplify right side
   1,667.21x = 1,790,370.95
5. Step 5: Solve for x
   x = 1,790,370.95/1,667.21
6. Step 6: Final answer
   x = 1,073.88