Finding the Fourth Proportional to 43,146.42, 64,715.37 and 13,563.47

Step by Step Solution

1. Step 1: Write the proportion equation
   43,146.42 : 64,715.37 = 13,563.47 : x
2. Step 2: Convert to fraction form
   43,146.42/64,715.37 = 13,563.47/x
3. Step 3: Cross multiply
   43,146.42x = 64,715.37 × 13,563.47
4. Step 4: Simplify right side
   43,146.42x = 877,764,655.96
5. Step 5: Solve for x
   x = 877,764,655.96/43,146.42
6. Step 6: Final answer
   x = 20,343.86