Finding the Fourth Proportional to 1,109.18, 1,530.42 and 667.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.18 : 1,530.42 = 667.02 : x
2. Step 2: Convert to fraction form
   1,109.18/1,530.42 = 667.02/x
3. Step 3: Cross multiply
   1,109.18x = 1,530.42 × 667.02
4. Step 4: Simplify right side
   1,109.18x = 1,020,820.75
5. Step 5: Solve for x
   x = 1,020,820.75/1,109.18
6. Step 6: Final answer
   x = 920.34