Finding the Fourth Proportional to 9,414.08, 12,990.48 and 5,436.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.08 : 12,990.48 = 5,436.46 : x
2. Step 2: Convert to fraction form
   9,414.08/12,990.48 = 5,436.46/x
3. Step 3: Cross multiply
   9,414.08x = 12,990.48 × 5,436.46
4. Step 4: Simplify right side
   9,414.08x = 70,622,224.90
5. Step 5: Solve for x
   x = 70,622,224.90/9,414.08
6. Step 6: Final answer
   x = 7,501.77