Finding the Fourth Proportional to 9,198.32, 12,693.76 and 5,420.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,198.32 : 12,693.76 = 5,420.76 : x
2. Step 2: Convert to fraction form
   9,198.32/12,693.76 = 5,420.76/x
3. Step 3: Cross multiply
   9,198.32x = 12,693.76 × 5,420.76
4. Step 4: Simplify right side
   9,198.32x = 68,809,826.46
5. Step 5: Solve for x
   x = 68,809,826.46/9,198.32
6. Step 6: Final answer
   x = 7,480.70