Finding the Fourth Proportional to 21,405.33, 32,074.29 and 10,147.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,405.33 : 32,074.29 = 10,147.77 : x
2. Step 2: Convert to fraction form
   21,405.33/32,074.29 = 10,147.77/x
3. Step 3: Cross multiply
   21,405.33x = 32,074.29 × 10,147.77
4. Step 4: Simplify right side
   21,405.33x = 325,482,517.83
5. Step 5: Solve for x
   x = 325,482,517.83/21,405.33
6. Step 6: Final answer
   x = 15,205.68