Finding the Fourth Proportional to 1,435.10, 1,980.61 and 845.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.10 : 1,980.61 = 845.63 : x
2. Step 2: Convert to fraction form
   1,435.10/1,980.61 = 845.63/x
3. Step 3: Cross multiply
   1,435.10x = 1,980.61 × 845.63
4. Step 4: Simplify right side
   1,435.10x = 1,674,851.22
5. Step 5: Solve for x
   x = 1,674,851.22/1,435.10
6. Step 6: Final answer
   x = 1,167.06