Finding the Fourth Proportional to 1,083.16, 1,494.72 and 641.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.16 : 1,494.72 = 641.32 : x
2. Step 2: Convert to fraction form
   1,083.16/1,494.72 = 641.32/x
3. Step 3: Cross multiply
   1,083.16x = 1,494.72 × 641.32
4. Step 4: Simplify right side
   1,083.16x = 958,593.83
5. Step 5: Solve for x
   x = 958,593.83/1,083.16
6. Step 6: Final answer
   x = 885.00