Finding the Fourth Proportional to 43,387.02, 65,057.49 and 19,993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,387.02 : 65,057.49 = 19,993.50 : x
2. Step 2: Convert to fraction form
   43,387.02/65,057.49 = 19,993.50/x
3. Step 3: Cross multiply
   43,387.02x = 65,057.49 × 19,993.50
4. Step 4: Simplify right side
   43,387.02x = 1,300,726,926.32
5. Step 5: Solve for x
   x = 1,300,726,926.32/43,387.02
6. Step 6: Final answer
   x = 29,979.63