Finding the Fourth Proportional to 1,105.63, 1,654.35 and 667.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.63 : 1,654.35 = 667.13 : x
2. Step 2: Convert to fraction form
   1,105.63/1,654.35 = 667.13/x
3. Step 3: Cross multiply
   1,105.63x = 1,654.35 × 667.13
4. Step 4: Simplify right side
   1,105.63x = 1,103,666.52
5. Step 5: Solve for x
   x = 1,103,666.52/1,105.63
6. Step 6: Final answer
   x = 998.23