Finding the Fourth Proportional to 21,716.93, 29,965.50 and 12,766.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,716.93 : 29,965.50 = 12,766.25 : x
2. Step 2: Convert to fraction form
   21,716.93/29,965.50 = 12,766.25/x
3. Step 3: Cross multiply
   21,716.93x = 29,965.50 × 12,766.25
4. Step 4: Simplify right side
   21,716.93x = 382,546,914.55
5. Step 5: Solve for x
   x = 382,546,914.55/21,716.93
6. Step 6: Final answer
   x = 17,615.15