Finding the Fourth Proportional to 9,389.60, 12,953.76 and 5,857.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.60 : 12,953.76 = 5,857.28 : x
2. Step 2: Convert to fraction form
   9,389.60/12,953.76 = 5,857.28/x
3. Step 3: Cross multiply
   9,389.60x = 12,953.76 × 5,857.28
4. Step 4: Simplify right side
   9,389.60x = 75,873,799.37
5. Step 5: Solve for x
   x = 75,873,799.37/9,389.60
6. Step 6: Final answer
   x = 8,080.62