Finding the Fourth Proportional to 1,667.21, 2,499.75 and 886.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.21 : 2,499.75 = 886.73 : x
2. Step 2: Convert to fraction form
   1,667.21/2,499.75 = 886.73/x
3. Step 3: Cross multiply
   1,667.21x = 2,499.75 × 886.73
4. Step 4: Simplify right side
   1,667.21x = 2,216,590.82
5. Step 5: Solve for x
   x = 2,216,590.82/1,667.21
6. Step 6: Final answer
   x = 1,329.53