Finding the Fourth Proportional to 21,963, 30,308.96 and 12,534.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,963 : 30,308.96 = 12,534.60 : x
2. Step 2: Convert to fraction form
   21,963/30,308.96 = 12,534.60/x
3. Step 3: Cross multiply
   21,963x = 30,308.96 × 12,534.60
4. Step 4: Simplify right side
   21,963x = 379,910,690.02
5. Step 5: Solve for x
   x = 379,910,690.02/21,963
6. Step 6: Final answer
   x = 17,297.76