Finding the Fourth Proportional to 8,561.71, 12,845.31 and 3,635.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.71 : 12,845.31 = 3,635.50 : x
2. Step 2: Convert to fraction form
   8,561.71/12,845.31 = 3,635.50/x
3. Step 3: Cross multiply
   8,561.71x = 12,845.31 × 3,635.50
4. Step 4: Simplify right side
   8,561.71x = 46,699,060.28
5. Step 5: Solve for x
   x = 46,699,060.28/8,561.71
6. Step 6: Final answer
   x = 5,454.41