Finding the Fourth Proportional to 21,973.46, 30,328.80 and 12,547.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,973.46 : 30,328.80 = 12,547.49 : x
2. Step 2: Convert to fraction form
   21,973.46/30,328.80 = 12,547.49/x
3. Step 3: Cross multiply
   21,973.46x = 30,328.80 × 12,547.49
4. Step 4: Simplify right side
   21,973.46x = 380,550,314.71
5. Step 5: Solve for x
   x = 380,550,314.71/21,973.46
6. Step 6: Final answer
   x = 17,318.63