Finding the Fourth Proportional to 21,980.07, 30,333.06 and 12,549.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,980.07 : 30,333.06 = 12,549.51 : x
2. Step 2: Convert to fraction form
   21,980.07/30,333.06 = 12,549.51/x
3. Step 3: Cross multiply
   21,980.07x = 30,333.06 × 12,549.51
4. Step 4: Simplify right side
   21,980.07x = 380,665,039.80
5. Step 5: Solve for x
   x = 380,665,039.80/21,980.07
6. Step 6: Final answer
   x = 17,318.65