Finding the Fourth Proportional to 43,109.69, 64,675.47 and 13,527.78

Step by Step Solution

1. Step 1: Write the proportion equation
   43,109.69 : 64,675.47 = 13,527.78 : x
2. Step 2: Convert to fraction form
   43,109.69/64,675.47 = 13,527.78/x
3. Step 3: Cross multiply
   43,109.69x = 64,675.47 × 13,527.78
4. Step 4: Simplify right side
   43,109.69x = 874,915,529.56
5. Step 5: Solve for x
   x = 874,915,529.56/43,109.69
6. Step 6: Final answer
   x = 20,295.10