Finding the Fourth Proportional to 21,596.32, 32,443.52 and 18,643.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,596.32 : 32,443.52 = 18,643.84 : x
2. Step 2: Convert to fraction form
   21,596.32/32,443.52 = 18,643.84/x
3. Step 3: Cross multiply
   21,596.32x = 32,443.52 × 18,643.84
4. Step 4: Simplify right side
   21,596.32x = 604,871,795.92
5. Step 5: Solve for x
   x = 604,871,795.92/21,596.32
6. Step 6: Final answer
   x = 28,008.10