Finding the Fourth Proportional to 1,446.42, 2,166.56 and 667.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.42 : 2,166.56 = 667.06 : x
2. Step 2: Convert to fraction form
   1,446.42/2,166.56 = 667.06/x
3. Step 3: Cross multiply
   1,446.42x = 2,166.56 × 667.06
4. Step 4: Simplify right side
   1,446.42x = 1,445,225.51
5. Step 5: Solve for x
   x = 1,445,225.51/1,446.42
6. Step 6: Final answer
   x = 999.17