Finding the Fourth Proportional to 11,454.89, 15,808.72 and 6,419.06

Step by Step Solution

1. Step 1: Write the proportion equation
   11,454.89 : 15,808.72 = 6,419.06 : x
2. Step 2: Convert to fraction form
   11,454.89/15,808.72 = 6,419.06/x
3. Step 3: Cross multiply
   11,454.89x = 15,808.72 × 6,419.06
4. Step 4: Simplify right side
   11,454.89x = 101,477,043.16
5. Step 5: Solve for x
   x = 101,477,043.16/11,454.89
6. Step 6: Final answer
   x = 8,858.84