Finding the Fourth Proportional to 21,579, 32,368.52 and 12,338.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,579 : 32,368.52 = 12,338.52 : x
2. Step 2: Convert to fraction form
   21,579/32,368.52 = 12,338.52/x
3. Step 3: Cross multiply
   21,579x = 32,368.52 × 12,338.52
4. Step 4: Simplify right side
   21,579x = 399,379,631.39
5. Step 5: Solve for x
   x = 399,379,631.39/21,579
6. Step 6: Final answer
   x = 18,507.79