Finding the Fourth Proportional to 1,553.23, 2,143.50 and 845.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.23 : 2,143.50 = 845.12 : x
2. Step 2: Convert to fraction form
   1,553.23/2,143.50 = 845.12/x
3. Step 3: Cross multiply
   1,553.23x = 2,143.50 × 845.12
4. Step 4: Simplify right side
   1,553.23x = 1,811,499.78
5. Step 5: Solve for x
   x = 1,811,499.78/1,553.23
6. Step 6: Final answer
   x = 1,166.28