Finding the Fourth Proportional to 7,118.48, 9,826.16 and 5,355.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,118.48 : 9,826.16 = 5,355.15 : x
2. Step 2: Convert to fraction form
   7,118.48/9,826.16 = 5,355.15/x
3. Step 3: Cross multiply
   7,118.48x = 9,826.16 × 5,355.15
4. Step 4: Simplify right side
   7,118.48x = 52,620,533.95
5. Step 5: Solve for x
   x = 52,620,533.95/7,118.48
6. Step 6: Final answer
   x = 7,392.11