Finding the Fourth Proportional to 21,230.02, 31,849.53 and 7,189.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,230.02 : 31,849.53 = 7,189.37 : x
2. Step 2: Convert to fraction form
   21,230.02/31,849.53 = 7,189.37/x
3. Step 3: Cross multiply
   21,230.02x = 31,849.53 × 7,189.37
4. Step 4: Simplify right side
   21,230.02x = 228,978,055.50
5. Step 5: Solve for x
   x = 228,978,055.50/21,230.02
6. Step 6: Final answer
   x = 10,785.58