Finding the Fourth Proportional to 10,959.30, 16,420.05 and 5,103.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,959.30 : 16,420.05 = 5,103.90 : x
2. Step 2: Convert to fraction form
   10,959.30/16,420.05 = 5,103.90/x
3. Step 3: Cross multiply
   10,959.30x = 16,420.05 × 5,103.90
4. Step 4: Simplify right side
   10,959.30x = 83,806,293.20
5. Step 5: Solve for x
   x = 83,806,293.20/10,959.30
6. Step 6: Final answer
   x = 7,647.05