Finding the Fourth Proportional to 21,980.45, 30,327.76 and 13,026.41

Step by Step Solution

1. Step 1: Write the proportion equation
   21,980.45 : 30,327.76 = 13,026.41 : x
2. Step 2: Convert to fraction form
   21,980.45/30,327.76 = 13,026.41/x
3. Step 3: Cross multiply
   21,980.45x = 30,327.76 × 13,026.41
4. Step 4: Simplify right side
   21,980.45x = 395,061,836.14
5. Step 5: Solve for x
   x = 395,061,836.14/21,980.45
6. Step 6: Final answer
   x = 17,973.33