Finding the Fourth Proportional to 21,365.20, 32,054.94 and 13,458.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,365.20 : 32,054.94 = 13,458.59 : x
2. Step 2: Convert to fraction form
   21,365.20/32,054.94 = 13,458.59/x
3. Step 3: Cross multiply
   21,365.20x = 32,054.94 × 13,458.59
4. Step 4: Simplify right side
   21,365.20x = 431,414,254.87
5. Step 5: Solve for x
   x = 431,414,254.87/21,365.20
6. Step 6: Final answer
   x = 20,192.38