Finding the Fourth Proportional to 1,434.12, 1,978.80 and 844.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.12 : 1,978.80 = 844.56 : x
2. Step 2: Convert to fraction form
   1,434.12/1,978.80 = 844.56/x
3. Step 3: Cross multiply
   1,434.12x = 1,978.80 × 844.56
4. Step 4: Simplify right side
   1,434.12x = 1,671,215.33
5. Step 5: Solve for x
   x = 1,671,215.33/1,434.12
6. Step 6: Final answer
   x = 1,165.32