Finding the Fourth Proportional to 42,960.03, 64,414.16 and 19,263.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,960.03 : 64,414.16 = 19,263.28 : x
2. Step 2: Convert to fraction form
   42,960.03/64,414.16 = 19,263.28/x
3. Step 3: Cross multiply
   42,960.03x = 64,414.16 × 19,263.28
4. Step 4: Simplify right side
   42,960.03x = 1,240,828,162.38
5. Step 5: Solve for x
   x = 1,240,828,162.38/42,960.03
6. Step 6: Final answer
   x = 28,883.32