Finding the Fourth Proportional to 9,146.51, 12,621.92 and 5,369.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.51 : 12,621.92 = 5,369.61 : x
2. Step 2: Convert to fraction form
   9,146.51/12,621.92 = 5,369.61/x
3. Step 3: Cross multiply
   9,146.51x = 12,621.92 × 5,369.61
4. Step 4: Simplify right side
   9,146.51x = 67,774,787.85
5. Step 5: Solve for x
   x = 67,774,787.85/9,146.51
6. Step 6: Final answer
   x = 7,409.91