Finding the Fourth Proportional to 43,233.69, 64,852.52 and 13,245.78

Step by Step Solution

1. Step 1: Write the proportion equation
   43,233.69 : 64,852.52 = 13,245.78 : x
2. Step 2: Convert to fraction form
   43,233.69/64,852.52 = 13,245.78/x
3. Step 3: Cross multiply
   43,233.69x = 64,852.52 × 13,245.78
4. Step 4: Simplify right side
   43,233.69x = 859,022,099.05
5. Step 5: Solve for x
   x = 859,022,099.05/43,233.69
6. Step 6: Final answer
   x = 19,869.28