Finding the Fourth Proportional to 1,732.58, 2,390.69 and 986.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,732.58 : 2,390.69 = 986.57 : x
2. Step 2: Convert to fraction form
   1,732.58/2,390.69 = 986.57/x
3. Step 3: Cross multiply
   1,732.58x = 2,390.69 × 986.57
4. Step 4: Simplify right side
   1,732.58x = 2,358,573.55
5. Step 5: Solve for x
   x = 2,358,573.55/1,732.58
6. Step 6: Final answer
   x = 1,361.31