Finding the Fourth Proportional to 21,977.84, 30,331.59 and 12,547.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,977.84 : 30,331.59 = 12,547.82 : x
2. Step 2: Convert to fraction form
   21,977.84/30,331.59 = 12,547.82/x
3. Step 3: Cross multiply
   21,977.84x = 30,331.59 × 12,547.82
4. Step 4: Simplify right side
   21,977.84x = 380,595,331.63
5. Step 5: Solve for x
   x = 380,595,331.63/21,977.84
6. Step 6: Final answer
   x = 17,317.23