Finding the Fourth Proportional to 8,897.60, 12,279.15 and 4,919.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,897.60 : 12,279.15 = 4,919.07 : x
2. Step 2: Convert to fraction form
   8,897.60/12,279.15 = 4,919.07/x
3. Step 3: Cross multiply
   8,897.60x = 12,279.15 × 4,919.07
4. Step 4: Simplify right side
   8,897.60x = 60,401,998.39
5. Step 5: Solve for x
   x = 60,401,998.39/8,897.60
6. Step 6: Final answer
   x = 6,788.58