Finding the Fourth Proportional to 1,140.41, 1,573.72 and 636.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.41 : 1,573.72 = 636.25 : x
2. Step 2: Convert to fraction form
   1,140.41/1,573.72 = 636.25/x
3. Step 3: Cross multiply
   1,140.41x = 1,573.72 × 636.25
4. Step 4: Simplify right side
   1,140.41x = 1,001,279.35
5. Step 5: Solve for x
   x = 1,001,279.35/1,140.41
6. Step 6: Final answer
   x = 878.00