Finding the Fourth Proportional to 9,200.74, 12,696.90 and 5,424.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,200.74 : 12,696.90 = 5,424.07 : x
2. Step 2: Convert to fraction form
   9,200.74/12,696.90 = 5,424.07/x
3. Step 3: Cross multiply
   9,200.74x = 12,696.90 × 5,424.07
4. Step 4: Simplify right side
   9,200.74x = 68,868,874.38
5. Step 5: Solve for x
   x = 68,868,874.38/9,200.74
6. Step 6: Final answer
   x = 7,485.15