Finding the Fourth Proportional to 19,782.72, 29,663.82 and 8,684.37

Step by Step Solution

1. Step 1: Write the proportion equation
   19,782.72 : 29,663.82 = 8,684.37 : x
2. Step 2: Convert to fraction form
   19,782.72/29,663.82 = 8,684.37/x
3. Step 3: Cross multiply
   19,782.72x = 29,663.82 × 8,684.37
4. Step 4: Simplify right side
   19,782.72x = 257,611,588.49
5. Step 5: Solve for x
   x = 257,611,588.49/19,782.72
6. Step 6: Final answer
   x = 13,022.05