Finding the Fourth Proportional to 12,290.33, 18,435.59 and 7,623.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.33 : 18,435.59 = 7,623.92 : x
2. Step 2: Convert to fraction form
   12,290.33/18,435.59 = 7,623.92/x
3. Step 3: Cross multiply
   12,290.33x = 18,435.59 × 7,623.92
4. Step 4: Simplify right side
   12,290.33x = 140,551,463.31
5. Step 5: Solve for x
   x = 140,551,463.31/12,290.33
6. Step 6: Final answer
   x = 11,435.94