Finding the Fourth Proportional to 1,993.58, 2,989.35 and 1,172.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,993.58 : 2,989.35 = 1,172.10 : x
2. Step 2: Convert to fraction form
   1,993.58/2,989.35 = 1,172.10/x
3. Step 3: Cross multiply
   1,993.58x = 2,989.35 × 1,172.10
4. Step 4: Simplify right side
   1,993.58x = 3,503,817.14
5. Step 5: Solve for x
   x = 3,503,817.14/1,993.58
6. Step 6: Final answer
   x = 1,757.55