Finding the Fourth Proportional to 43,287.59, 64,942.89 and 13,706.03

Step by Step Solution

1. Step 1: Write the proportion equation
   43,287.59 : 64,942.89 = 13,706.03 : x
2. Step 2: Convert to fraction form
   43,287.59/64,942.89 = 13,706.03/x
3. Step 3: Cross multiply
   43,287.59x = 64,942.89 × 13,706.03
4. Step 4: Simplify right side
   43,287.59x = 890,109,198.63
5. Step 5: Solve for x
   x = 890,109,198.63/43,287.59
6. Step 6: Final answer
   x = 20,562.69