Finding the Fourth Proportional to 1,085.32, 1,497.98 and 637.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.32 : 1,497.98 = 637.39 : x
2. Step 2: Convert to fraction form
   1,085.32/1,497.98 = 637.39/x
3. Step 3: Cross multiply
   1,085.32x = 1,497.98 × 637.39
4. Step 4: Simplify right side
   1,085.32x = 954,786.80
5. Step 5: Solve for x
   x = 954,786.80/1,085.32
6. Step 6: Final answer
   x = 879.73