Finding the Fourth Proportional to 7,107.54, 10,647.63 and 3,978.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,107.54 : 10,647.63 = 3,978.07 : x
2. Step 2: Convert to fraction form
   7,107.54/10,647.63 = 3,978.07/x
3. Step 3: Cross multiply
   7,107.54x = 10,647.63 × 3,978.07
4. Step 4: Simplify right side
   7,107.54x = 42,357,017.47
5. Step 5: Solve for x
   x = 42,357,017.47/7,107.54
6. Step 6: Final answer
   x = 5,959.45