Finding the Fourth Proportional to 1,434.19, 1,978.69 and 836.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.19 : 1,978.69 = 836.41 : x
2. Step 2: Convert to fraction form
   1,434.19/1,978.69 = 836.41/x
3. Step 3: Cross multiply
   1,434.19x = 1,978.69 × 836.41
4. Step 4: Simplify right side
   1,434.19x = 1,654,996.10
5. Step 5: Solve for x
   x = 1,654,996.10/1,434.19
6. Step 6: Final answer
   x = 1,153.96