Finding the Fourth Proportional to 42,834.27, 64,310.37 and 21,788.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,834.27 : 64,310.37 = 21,788.56 : x
2. Step 2: Convert to fraction form
   42,834.27/64,310.37 = 21,788.56/x
3. Step 3: Cross multiply
   42,834.27x = 64,310.37 × 21,788.56
4. Step 4: Simplify right side
   42,834.27x = 1,401,230,074.01
5. Step 5: Solve for x
   x = 1,401,230,074.01/42,834.27
6. Step 6: Final answer
   x = 32,712.83