Finding the Fourth Proportional to 43,059.30, 64,601.25 and 13,485.59

Step by Step Solution

1. Step 1: Write the proportion equation
   43,059.30 : 64,601.25 = 13,485.59 : x
2. Step 2: Convert to fraction form
   43,059.30/64,601.25 = 13,485.59/x
3. Step 3: Cross multiply
   43,059.30x = 64,601.25 × 13,485.59
4. Step 4: Simplify right side
   43,059.30x = 871,185,839.66
5. Step 5: Solve for x
   x = 871,185,839.66/43,059.30
6. Step 6: Final answer
   x = 20,232.24