Finding the Fourth Proportional to 21,931.48, 30,264.06 and 12,371.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,931.48 : 30,264.06 = 12,371.32 : x
2. Step 2: Convert to fraction form
   21,931.48/30,264.06 = 12,371.32/x
3. Step 3: Cross multiply
   21,931.48x = 30,264.06 × 12,371.32
4. Step 4: Simplify right side
   21,931.48x = 374,406,370.76
5. Step 5: Solve for x
   x = 374,406,370.76/21,931.48
6. Step 6: Final answer
   x = 17,071.64