Finding the Fourth Proportional to 21,298.47, 31,967.37 and 10,775.90

Step by Step Solution

1. Step 1: Write the proportion equation
   21,298.47 : 31,967.37 = 10,775.90 : x
2. Step 2: Convert to fraction form
   21,298.47/31,967.37 = 10,775.90/x
3. Step 3: Cross multiply
   21,298.47x = 31,967.37 × 10,775.90
4. Step 4: Simplify right side
   21,298.47x = 344,477,022.55
5. Step 5: Solve for x
   x = 344,477,022.55/21,298.47
6. Step 6: Final answer
   x = 16,173.79