Finding the Fourth Proportional to 1,106.90, 1,527.50 and 609.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.90 : 1,527.50 = 609.54 : x
2. Step 2: Convert to fraction form
   1,106.90/1,527.50 = 609.54/x
3. Step 3: Cross multiply
   1,106.90x = 1,527.50 × 609.54
4. Step 4: Simplify right side
   1,106.90x = 931,064.72
5. Step 5: Solve for x
   x = 931,064.72/1,106.90
6. Step 6: Final answer
   x = 841.15