Finding the Fourth Proportional to 1,101.15, 1,519.32 and 681.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.15 : 1,519.32 = 681.72 : x
2. Step 2: Convert to fraction form
   1,101.15/1,519.32 = 681.72/x
3. Step 3: Cross multiply
   1,101.15x = 1,519.32 × 681.72
4. Step 4: Simplify right side
   1,101.15x = 1,035,750.83
5. Step 5: Solve for x
   x = 1,035,750.83/1,101.15
6. Step 6: Final answer
   x = 940.61