Finding the Fourth Proportional to 2,902.32, 4,355.16 and 1,172.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,902.32 : 4,355.16 = 1,172.40 : x
2. Step 2: Convert to fraction form
   2,902.32/4,355.16 = 1,172.40/x
3. Step 3: Cross multiply
   2,902.32x = 4,355.16 × 1,172.40
4. Step 4: Simplify right side
   2,902.32x = 5,105,989.58
5. Step 5: Solve for x
   x = 5,105,989.58/2,902.32
6. Step 6: Final answer
   x = 1,759.28