Finding the Fourth Proportional to 42,727.30, 64,097.03 and 13,147.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,727.30 : 64,097.03 = 13,147.54 : x
2. Step 2: Convert to fraction form
   42,727.30/64,097.03 = 13,147.54/x
3. Step 3: Cross multiply
   42,727.30x = 64,097.03 × 13,147.54
4. Step 4: Simplify right side
   42,727.30x = 842,718,265.81
5. Step 5: Solve for x
   x = 842,718,265.81/42,727.30
6. Step 6: Final answer
   x = 19,723.18