Finding the Fourth Proportional to 2,172.24, 2,994.12 and 1,778.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.24 : 2,994.12 = 1,778.58 : x
2. Step 2: Convert to fraction form
   2,172.24/2,994.12 = 1,778.58/x
3. Step 3: Cross multiply
   2,172.24x = 2,994.12 × 1,778.58
4. Step 4: Simplify right side
   2,172.24x = 5,325,281.95
5. Step 5: Solve for x
   x = 5,325,281.95/2,172.24
6. Step 6: Final answer
   x = 2,451.52