Finding the Fourth Proportional to 1,435.32, 1,980.84 and 845.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.32 : 1,980.84 = 845.70 : x
2. Step 2: Convert to fraction form
   1,435.32/1,980.84 = 845.70/x
3. Step 3: Cross multiply
   1,435.32x = 1,980.84 × 845.70
4. Step 4: Simplify right side
   1,435.32x = 1,675,196.39
5. Step 5: Solve for x
   x = 1,675,196.39/1,435.32
6. Step 6: Final answer
   x = 1,167.12