Finding the Fourth Proportional to 1,109.58, 1,531.10 and 667.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.58 : 1,531.10 = 667.46 : x
2. Step 2: Convert to fraction form
   1,109.58/1,531.10 = 667.46/x
3. Step 3: Cross multiply
   1,109.58x = 1,531.10 × 667.46
4. Step 4: Simplify right side
   1,109.58x = 1,021,948.01
5. Step 5: Solve for x
   x = 1,021,948.01/1,109.58
6. Step 6: Final answer
   x = 921.02