Finding the Fourth Proportional to 11,561.42, 15,954.59 and 6,456.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,561.42 : 15,954.59 = 6,456.88 : x
2. Step 2: Convert to fraction form
   11,561.42/15,954.59 = 6,456.88/x
3. Step 3: Cross multiply
   11,561.42x = 15,954.59 × 6,456.88
4. Step 4: Simplify right side
   11,561.42x = 103,016,761.02
5. Step 5: Solve for x
   x = 103,016,761.02/11,561.42
6. Step 6: Final answer
   x = 8,910.39