Finding the Fourth Proportional to 1,085.33, 1,625.15 and 842.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.33 : 1,625.15 = 842.06 : x
2. Step 2: Convert to fraction form
   1,085.33/1,625.15 = 842.06/x
3. Step 3: Cross multiply
   1,085.33x = 1,625.15 × 842.06
4. Step 4: Simplify right side
   1,085.33x = 1,368,461.47
5. Step 5: Solve for x
   x = 1,368,461.47/1,085.33
6. Step 6: Final answer
   x = 1,260.88