Finding the Fourth Proportional to 1,764.72, 2,647.56 and 610.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.72 : 2,647.56 = 610.32 : x
2. Step 2: Convert to fraction form
   1,764.72/2,647.56 = 610.32/x
3. Step 3: Cross multiply
   1,764.72x = 2,647.56 × 610.32
4. Step 4: Simplify right side
   1,764.72x = 1,615,858.82
5. Step 5: Solve for x
   x = 1,615,858.82/1,764.72
6. Step 6: Final answer
   x = 915.65