Finding the Fourth Proportional to 1,345.59, 1,857.02 and 821.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.59 : 1,857.02 = 821.73 : x
2. Step 2: Convert to fraction form
   1,345.59/1,857.02 = 821.73/x
3. Step 3: Cross multiply
   1,345.59x = 1,857.02 × 821.73
4. Step 4: Simplify right side
   1,345.59x = 1,525,964.94
5. Step 5: Solve for x
   x = 1,525,964.94/1,345.59
6. Step 6: Final answer
   x = 1,134.05