Finding the Fourth Proportional to 1,434.03, 1,978.18 and 844.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.03 : 1,978.18 = 844.21 : x
2. Step 2: Convert to fraction form
   1,434.03/1,978.18 = 844.21/x
3. Step 3: Cross multiply
   1,434.03x = 1,978.18 × 844.21
4. Step 4: Simplify right side
   1,434.03x = 1,669,999.34
5. Step 5: Solve for x
   x = 1,669,999.34/1,434.03
6. Step 6: Final answer
   x = 1,164.55