Finding the Fourth Proportional to 1,076.88, 1,615.78 and 460.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.88 : 1,615.78 = 460.72 : x
2. Step 2: Convert to fraction form
   1,076.88/1,615.78 = 460.72/x
3. Step 3: Cross multiply
   1,076.88x = 1,615.78 × 460.72
4. Step 4: Simplify right side
   1,076.88x = 744,422.16
5. Step 5: Solve for x
   x = 744,422.16/1,076.88
6. Step 6: Final answer
   x = 691.28