Finding the Fourth Proportional to 1,109.83, 1,530.86 and 667.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.83 : 1,530.86 = 667.87 : x
2. Step 2: Convert to fraction form
   1,109.83/1,530.86 = 667.87/x
3. Step 3: Cross multiply
   1,109.83x = 1,530.86 × 667.87
4. Step 4: Simplify right side
   1,109.83x = 1,022,412.13
5. Step 5: Solve for x
   x = 1,022,412.13/1,109.83
6. Step 6: Final answer
   x = 921.23