Finding the Fourth Proportional to 1,435.22, 1,981.11 and 845.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.22 : 1,981.11 = 845.72 : x
2. Step 2: Convert to fraction form
   1,435.22/1,981.11 = 845.72/x
3. Step 3: Cross multiply
   1,435.22x = 1,981.11 × 845.72
4. Step 4: Simplify right side
   1,435.22x = 1,675,457.91
5. Step 5: Solve for x
   x = 1,675,457.91/1,435.22
6. Step 6: Final answer
   x = 1,167.39