Finding the Fourth Proportional to 13,308.22, 18,364.73 and 7,638.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.22 : 18,364.73 = 7,638.98 : x
2. Step 2: Convert to fraction form
   13,308.22/18,364.73 = 7,638.98/x
3. Step 3: Cross multiply
   13,308.22x = 18,364.73 × 7,638.98
4. Step 4: Simplify right side
   13,308.22x = 140,287,675.16
5. Step 5: Solve for x
   x = 140,287,675.16/13,308.22
6. Step 6: Final answer
   x = 10,541.43