Finding the Fourth Proportional to 1,308.42, 1,805.58 and 836.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.42 : 1,805.58 = 836.10 : x
2. Step 2: Convert to fraction form
   1,308.42/1,805.58 = 836.10/x
3. Step 3: Cross multiply
   1,308.42x = 1,805.58 × 836.10
4. Step 4: Simplify right side
   1,308.42x = 1,509,645.44
5. Step 5: Solve for x
   x = 1,509,645.44/1,308.42
6. Step 6: Final answer
   x = 1,153.79