Finding the Fourth Proportional to 2,123.73, 2,933.30 and 1,857.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.73 : 2,933.30 = 1,857.50 : x
2. Step 2: Convert to fraction form
   2,123.73/2,933.30 = 1,857.50/x
3. Step 3: Cross multiply
   2,123.73x = 2,933.30 × 1,857.50
4. Step 4: Simplify right side
   2,123.73x = 5,448,580.80
5. Step 5: Solve for x
   x = 5,448,580.80/2,123.73
6. Step 6: Final answer
   x = 2,565.57