Finding the Fourth Proportional to 21,796.63, 30,071.61 and 14,247.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.63 : 30,071.61 = 14,247.31 : x
2. Step 2: Convert to fraction form
   21,796.63/30,071.61 = 14,247.31/x
3. Step 3: Cross multiply
   21,796.63x = 30,071.61 × 14,247.31
4. Step 4: Simplify right side
   21,796.63x = 428,439,549.87
5. Step 5: Solve for x
   x = 428,439,549.87/21,796.63
6. Step 6: Final answer
   x = 19,656.23