Finding the Fourth Proportional to 3,120.66, 4,681.31 and 1,068.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,120.66 : 4,681.31 = 1,068.82 : x
2. Step 2: Convert to fraction form
   3,120.66/4,681.31 = 1,068.82/x
3. Step 3: Cross multiply
   3,120.66x = 4,681.31 × 1,068.82
4. Step 4: Simplify right side
   3,120.66x = 5,003,477.75
5. Step 5: Solve for x
   x = 5,003,477.75/3,120.66
6. Step 6: Final answer
   x = 1,603.34