Finding the Fourth Proportional to 1,111.08, 1,665.42 and 836.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.08 : 1,665.42 = 836.34 : x
2. Step 2: Convert to fraction form
   1,111.08/1,665.42 = 836.34/x
3. Step 3: Cross multiply
   1,111.08x = 1,665.42 × 836.34
4. Step 4: Simplify right side
   1,111.08x = 1,392,857.36
5. Step 5: Solve for x
   x = 1,392,857.36/1,111.08
6. Step 6: Final answer
   x = 1,253.61