Finding the Fourth Proportional to 6,507.36, 8,978.88 and 4,145.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,507.36 : 8,978.88 = 4,145.28 : x
2. Step 2: Convert to fraction form
   6,507.36/8,978.88 = 4,145.28/x
3. Step 3: Cross multiply
   6,507.36x = 8,978.88 × 4,145.28
4. Step 4: Simplify right side
   6,507.36x = 37,219,971.69
5. Step 5: Solve for x
   x = 37,219,971.69/6,507.36
6. Step 6: Final answer
   x = 5,719.67