Finding the Fourth Proportional to 21,378.72, 32,035.24 and 13,046.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,378.72 : 32,035.24 = 13,046.25 : x
2. Step 2: Convert to fraction form
   21,378.72/32,035.24 = 13,046.25/x
3. Step 3: Cross multiply
   21,378.72x = 32,035.24 × 13,046.25
4. Step 4: Simplify right side
   21,378.72x = 417,939,749.85
5. Step 5: Solve for x
   x = 417,939,749.85/21,378.72
6. Step 6: Final answer
   x = 19,549.33