Finding the Fourth Proportional to 2,123.75, 2,931.05 and 1,192.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.75 : 2,931.05 = 1,192.25 : x
2. Step 2: Convert to fraction form
   2,123.75/2,931.05 = 1,192.25/x
3. Step 3: Cross multiply
   2,123.75x = 2,931.05 × 1,192.25
4. Step 4: Simplify right side
   2,123.75x = 3,494,544.36
5. Step 5: Solve for x
   x = 3,494,544.36/2,123.75
6. Step 6: Final answer
   x = 1,645.46