Finding the Fourth Proportional to 1,345.46, 1,857.78 and 1,050.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.46 : 1,857.78 = 1,050.21 : x
2. Step 2: Convert to fraction form
   1,345.46/1,857.78 = 1,050.21/x
3. Step 3: Cross multiply
   1,345.46x = 1,857.78 × 1,050.21
4. Step 4: Simplify right side
   1,345.46x = 1,951,059.13
5. Step 5: Solve for x
   x = 1,951,059.13/1,345.46
6. Step 6: Final answer
   x = 1,450.11