Finding the Fourth Proportional to 42,512.42, 63,772.24 and 12,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,512.42 : 63,772.24 = 12,930.50 : x
2. Step 2: Convert to fraction form
   42,512.42/63,772.24 = 12,930.50/x
3. Step 3: Cross multiply
   42,512.42x = 63,772.24 × 12,930.50
4. Step 4: Simplify right side
   42,512.42x = 824,606,949.32
5. Step 5: Solve for x
   x = 824,606,949.32/42,512.42
6. Step 6: Final answer
   x = 19,396.85