Finding the Fourth Proportional to 1,764.56, 2,646.72 and 610.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.56 : 2,646.72 = 610.40 : x
2. Step 2: Convert to fraction form
   1,764.56/2,646.72 = 610.40/x
3. Step 3: Cross multiply
   1,764.56x = 2,646.72 × 610.40
4. Step 4: Simplify right side
   1,764.56x = 1,615,557.89
5. Step 5: Solve for x
   x = 1,615,557.89/1,764.56
6. Step 6: Final answer
   x = 915.56