Finding the Fourth Proportional to 21,710.34, 29,927.61 and 16,986.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,710.34 : 29,927.61 = 16,986.42 : x
2. Step 2: Convert to fraction form
   21,710.34/29,927.61 = 16,986.42/x
3. Step 3: Cross multiply
   21,710.34x = 29,927.61 × 16,986.42
4. Step 4: Simplify right side
   21,710.34x = 508,362,953.06
5. Step 5: Solve for x
   x = 508,362,953.06/21,710.34
6. Step 6: Final answer
   x = 23,415.71