Finding the Fourth Proportional to 1,434.38, 1,978.49 and 845.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.38 : 1,978.49 = 845.10 : x
2. Step 2: Convert to fraction form
   1,434.38/1,978.49 = 845.10/x
3. Step 3: Cross multiply
   1,434.38x = 1,978.49 × 845.10
4. Step 4: Simplify right side
   1,434.38x = 1,672,024.01
5. Step 5: Solve for x
   x = 1,672,024.01/1,434.38
6. Step 6: Final answer
   x = 1,165.68