Finding the Fourth Proportional to 43,448.02, 65,150.16 and 21,228.10

Step by Step Solution

1. Step 1: Write the proportion equation
   43,448.02 : 65,150.16 = 21,228.10 : x
2. Step 2: Convert to fraction form
   43,448.02/65,150.16 = 21,228.10/x
3. Step 3: Cross multiply
   43,448.02x = 65,150.16 × 21,228.10
4. Step 4: Simplify right side
   43,448.02x = 1,383,014,111.50
5. Step 5: Solve for x
   x = 1,383,014,111.50/43,448.02
6. Step 6: Final answer
   x = 31,831.46