Finding the Fourth Proportional to 1,109.93, 1,531.85 and 667.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.93 : 1,531.85 = 667.94 : x
2. Step 2: Convert to fraction form
   1,109.93/1,531.85 = 667.94/x
3. Step 3: Cross multiply
   1,109.93x = 1,531.85 × 667.94
4. Step 4: Simplify right side
   1,109.93x = 1,023,172.89
5. Step 5: Solve for x
   x = 1,023,172.89/1,109.93
6. Step 6: Final answer
   x = 921.84