Finding the Fourth Proportional to 21,886.48, 30,196.38 and 12,937.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,886.48 : 30,196.38 = 12,937.06 : x
2. Step 2: Convert to fraction form
   21,886.48/30,196.38 = 12,937.06/x
3. Step 3: Cross multiply
   21,886.48x = 30,196.38 × 12,937.06
4. Step 4: Simplify right side
   21,886.48x = 390,652,379.84
5. Step 5: Solve for x
   x = 390,652,379.84/21,886.48
6. Step 6: Final answer
   x = 17,849.03