Finding the Fourth Proportional to 1,109.50, 1,662 and 670.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.50 : 1,662 = 670.48 : x
2. Step 2: Convert to fraction form
   1,109.50/1,662 = 670.48/x
3. Step 3: Cross multiply
   1,109.50x = 1,662 × 670.48
4. Step 4: Simplify right side
   1,109.50x = 1,114,337.76
5. Step 5: Solve for x
   x = 1,114,337.76/1,109.50
6. Step 6: Final answer
   x = 1,004.36