Finding the Fourth Proportional to 42,969.76, 64,399.24 and 19,260

Step by Step Solution

1. Step 1: Write the proportion equation
   42,969.76 : 64,399.24 = 19,260 : x
2. Step 2: Convert to fraction form
   42,969.76/64,399.24 = 19,260/x
3. Step 3: Cross multiply
   42,969.76x = 64,399.24 × 19,260
4. Step 4: Simplify right side
   42,969.76x = 1,240,329,362.40
5. Step 5: Solve for x
   x = 1,240,329,362.40/42,969.76
6. Step 6: Final answer
   x = 28,865.17