Finding the Fourth Proportional to 21,788.96, 30,073.88 and 13,298.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,788.96 : 30,073.88 = 13,298.10 : x
2. Step 2: Convert to fraction form
   21,788.96/30,073.88 = 13,298.10/x
3. Step 3: Cross multiply
   21,788.96x = 30,073.88 × 13,298.10
4. Step 4: Simplify right side
   21,788.96x = 399,925,496.87
5. Step 5: Solve for x
   x = 399,925,496.87/21,788.96
6. Step 6: Final answer
   x = 18,354.51