Finding the Fourth Proportional to 1,109.34, 1,530.90 and 612.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.34 : 1,530.90 = 612.03 : x
2. Step 2: Convert to fraction form
   1,109.34/1,530.90 = 612.03/x
3. Step 3: Cross multiply
   1,109.34x = 1,530.90 × 612.03
4. Step 4: Simplify right side
   1,109.34x = 936,956.73
5. Step 5: Solve for x
   x = 936,956.73/1,109.34
6. Step 6: Final answer
   x = 844.61