Finding the Fourth Proportional to 42,648.12, 63,979.34 and 13,058.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,648.12 : 63,979.34 = 13,058.82 : x
2. Step 2: Convert to fraction form
   42,648.12/63,979.34 = 13,058.82/x
3. Step 3: Cross multiply
   42,648.12x = 63,979.34 × 13,058.82
4. Step 4: Simplify right side
   42,648.12x = 835,494,619.48
5. Step 5: Solve for x
   x = 835,494,619.48/42,648.12
6. Step 6: Final answer
   x = 19,590.42