Finding the Fourth Proportional to 80,768.21, 121,152.38 and 21,603.83

Step by Step Solution

1. Step 1: Write the proportion equation
   80,768.21 : 121,152.38 = 21,603.83 : x
2. Step 2: Convert to fraction form
   80,768.21/121,152.38 = 21,603.83/x
3. Step 3: Cross multiply
   80,768.21x = 121,152.38 × 21,603.83
4. Step 4: Simplify right side
   80,768.21x = 2,617,354,707.83
5. Step 5: Solve for x
   x = 2,617,354,707.83/80,768.21
6. Step 6: Final answer
   x = 32,405.76