Finding the Fourth Proportional to 21,938.04, 30,275.89 and 12,374.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,938.04 : 30,275.89 = 12,374.49 : x
2. Step 2: Convert to fraction form
   21,938.04/30,275.89 = 12,374.49/x
3. Step 3: Cross multiply
   21,938.04x = 30,275.89 × 12,374.49
4. Step 4: Simplify right side
   21,938.04x = 374,648,679.95
5. Step 5: Solve for x
   x = 374,648,679.95/21,938.04
6. Step 6: Final answer
   x = 17,077.58