Finding the Fourth Proportional to 13,302.31, 18,358.84 and 7,638.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,302.31 : 18,358.84 = 7,638.83 : x
2. Step 2: Convert to fraction form
   13,302.31/18,358.84 = 7,638.83/x
3. Step 3: Cross multiply
   13,302.31x = 18,358.84 × 7,638.83
4. Step 4: Simplify right side
   13,302.31x = 140,240,057.76
5. Step 5: Solve for x
   x = 140,240,057.76/13,302.31
6. Step 6: Final answer
   x = 10,542.53