Finding the Fourth Proportional to 21,619.50, 32,429.52 and 7,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,619.50 : 32,429.52 = 7,768.50 : x
2. Step 2: Convert to fraction form
   21,619.50/32,429.52 = 7,768.50/x
3. Step 3: Cross multiply
   21,619.50x = 32,429.52 × 7,768.50
4. Step 4: Simplify right side
   21,619.50x = 251,928,726.12
5. Step 5: Solve for x
   x = 251,928,726.12/21,619.50
6. Step 6: Final answer
   x = 11,652.85