Finding the Fourth Proportional to 43,290.71, 64,942.56 and 15,205.81

Step by Step Solution

1. Step 1: Write the proportion equation
   43,290.71 : 64,942.56 = 15,205.81 : x
2. Step 2: Convert to fraction form
   43,290.71/64,942.56 = 15,205.81/x
3. Step 3: Cross multiply
   43,290.71x = 64,942.56 × 15,205.81
4. Step 4: Simplify right side
   43,290.71x = 987,504,228.27
5. Step 5: Solve for x
   x = 987,504,228.27/43,290.71
6. Step 6: Final answer
   x = 22,811.00