Finding the Fourth Proportional to 1,443.45, 1,992.63 and 845.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.45 : 1,992.63 = 845.86 : x
2. Step 2: Convert to fraction form
   1,443.45/1,992.63 = 845.86/x
3. Step 3: Cross multiply
   1,443.45x = 1,992.63 × 845.86
4. Step 4: Simplify right side
   1,443.45x = 1,685,486.76
5. Step 5: Solve for x
   x = 1,685,486.76/1,443.45
6. Step 6: Final answer
   x = 1,167.68