Finding the Fourth Proportional to 43,142.82, 64,717.02 and 13,561.89

Step by Step Solution

1. Step 1: Write the proportion equation
   43,142.82 : 64,717.02 = 13,561.89 : x
2. Step 2: Convert to fraction form
   43,142.82/64,717.02 = 13,561.89/x
3. Step 3: Cross multiply
   43,142.82x = 64,717.02 × 13,561.89
4. Step 4: Simplify right side
   43,142.82x = 877,685,106.37
5. Step 5: Solve for x
   x = 877,685,106.37/43,142.82
6. Step 6: Final answer
   x = 20,343.71