Finding the Fourth Proportional to 2,122.30, 2,928.82 and 1,178.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122.30 : 2,928.82 = 1,178.08 : x
2. Step 2: Convert to fraction form
   2,122.30/2,928.82 = 1,178.08/x
3. Step 3: Cross multiply
   2,122.30x = 2,928.82 × 1,178.08
4. Step 4: Simplify right side
   2,122.30x = 3,450,384.27
5. Step 5: Solve for x
   x = 3,450,384.27/2,122.30
6. Step 6: Final answer
   x = 1,625.78