Finding the Fourth Proportional to 1,435.34, 1,980.78 and 845.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.34 : 1,980.78 = 845.88 : x
2. Step 2: Convert to fraction form
   1,435.34/1,980.78 = 845.88/x
3. Step 3: Cross multiply
   1,435.34x = 1,980.78 × 845.88
4. Step 4: Simplify right side
   1,435.34x = 1,675,502.19
5. Step 5: Solve for x
   x = 1,675,502.19/1,435.34
6. Step 6: Final answer
   x = 1,167.32