Finding the Fourth Proportional to 1,921.42, 2,651.16 and 1,175.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.42 : 2,651.16 = 1,175.55 : x
2. Step 2: Convert to fraction form
   1,921.42/2,651.16 = 1,175.55/x
3. Step 3: Cross multiply
   1,921.42x = 2,651.16 × 1,175.55
4. Step 4: Simplify right side
   1,921.42x = 3,116,571.14
5. Step 5: Solve for x
   x = 3,116,571.14/1,921.42
6. Step 6: Final answer
   x = 1,622.01