Finding the Fourth Proportional to 43,118.56, 64,646.72 and 13,520.48

Step by Step Solution

1. Step 1: Write the proportion equation
   43,118.56 : 64,646.72 = 13,520.48 : x
2. Step 2: Convert to fraction form
   43,118.56/64,646.72 = 13,520.48/x
3. Step 3: Cross multiply
   43,118.56x = 64,646.72 × 13,520.48
4. Step 4: Simplify right side
   43,118.56x = 874,054,684.83
5. Step 5: Solve for x
   x = 874,054,684.83/43,118.56
6. Step 6: Final answer
   x = 20,270.96