Finding the Fourth Proportional to 42,442.29, 63,679.83 and 12,860.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,442.29 : 63,679.83 = 12,860.37 : x
2. Step 2: Convert to fraction form
   42,442.29/63,679.83 = 12,860.37/x
3. Step 3: Cross multiply
   42,442.29x = 63,679.83 × 12,860.37
4. Step 4: Simplify right side
   42,442.29x = 818,946,175.34
5. Step 5: Solve for x
   x = 818,946,175.34/42,442.29
6. Step 6: Final answer
   x = 19,295.52