Finding the Fourth Proportional to 11,454.58, 17,259.89 and 9,420.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,454.58 : 17,259.89 = 9,420.15 : x
2. Step 2: Convert to fraction form
   11,454.58/17,259.89 = 9,420.15/x
3. Step 3: Cross multiply
   11,454.58x = 17,259.89 × 9,420.15
4. Step 4: Simplify right side
   11,454.58x = 162,590,752.78
5. Step 5: Solve for x
   x = 162,590,752.78/11,454.58
6. Step 6: Final answer
   x = 14,194.39