Finding the Fourth Proportional to 21,886.01, 30,202.70 and 12,454.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,886.01 : 30,202.70 = 12,454.57 : x
2. Step 2: Convert to fraction form
   21,886.01/30,202.70 = 12,454.57/x
3. Step 3: Cross multiply
   21,886.01x = 30,202.70 × 12,454.57
4. Step 4: Simplify right side
   21,886.01x = 376,161,641.34
5. Step 5: Solve for x
   x = 376,161,641.34/21,886.01
6. Step 6: Final answer
   x = 17,187.31