Finding the Fourth Proportional to 21,835.23, 32,729.31 and 10,566.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,835.23 : 32,729.31 = 10,566.78 : x
2. Step 2: Convert to fraction form
   21,835.23/32,729.31 = 10,566.78/x
3. Step 3: Cross multiply
   21,835.23x = 32,729.31 × 10,566.78
4. Step 4: Simplify right side
   21,835.23x = 345,843,418.32
5. Step 5: Solve for x
   x = 345,843,418.32/21,835.23
6. Step 6: Final answer
   x = 15,838.78