Finding the Fourth Proportional to 1,106.43, 1,526.72 and 609.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.43 : 1,526.72 = 609.07 : x
2. Step 2: Convert to fraction form
   1,106.43/1,526.72 = 609.07/x
3. Step 3: Cross multiply
   1,106.43x = 1,526.72 × 609.07
4. Step 4: Simplify right side
   1,106.43x = 929,875.35
5. Step 5: Solve for x
   x = 929,875.35/1,106.43
6. Step 6: Final answer
   x = 840.43