Finding the Fourth Proportional to 42,930, 64,398.24 and 15,228

Step by Step Solution

1. Step 1: Write the proportion equation
   42,930 : 64,398.24 = 15,228 : x
2. Step 2: Convert to fraction form
   42,930/64,398.24 = 15,228/x
3. Step 3: Cross multiply
   42,930x = 64,398.24 × 15,228
4. Step 4: Simplify right side
   42,930x = 980,656,398.72
5. Step 5: Solve for x
   x = 980,656,398.72/42,930
6. Step 6: Final answer
   x = 22,843.15