Finding the Fourth Proportional to 1,074.42, 1,609.52 and 610.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.42 : 1,609.52 = 610.81 : x
2. Step 2: Convert to fraction form
   1,074.42/1,609.52 = 610.81/x
3. Step 3: Cross multiply
   1,074.42x = 1,609.52 × 610.81
4. Step 4: Simplify right side
   1,074.42x = 983,110.91
5. Step 5: Solve for x
   x = 983,110.91/1,074.42
6. Step 6: Final answer
   x = 915.02