Finding the Fourth Proportional to 12,998.03, 19,498.25 and 3,638.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,998.03 : 19,498.25 = 3,638.03 : x
2. Step 2: Convert to fraction form
   12,998.03/19,498.25 = 3,638.03/x
3. Step 3: Cross multiply
   12,998.03x = 19,498.25 × 3,638.03
4. Step 4: Simplify right side
   12,998.03x = 70,935,102.77
5. Step 5: Solve for x
   x = 70,935,102.77/12,998.03
6. Step 6: Final answer
   x = 5,457.38