Finding the Fourth Proportional to 9,610.64, 13,262.28 and 5,419.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,610.64 : 13,262.28 = 5,419.28 : x
2. Step 2: Convert to fraction form
   9,610.64/13,262.28 = 5,419.28/x
3. Step 3: Cross multiply
   9,610.64x = 13,262.28 × 5,419.28
4. Step 4: Simplify right side
   9,610.64x = 71,872,008.76
5. Step 5: Solve for x
   x = 71,872,008.76/9,610.64
6. Step 6: Final answer
   x = 7,478.38