Finding the Fourth Proportional to 42,467.42, 63,701.27 and 12,885.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,467.42 : 63,701.27 = 12,885.50 : x
2. Step 2: Convert to fraction form
   42,467.42/63,701.27 = 12,885.50/x
3. Step 3: Cross multiply
   42,467.42x = 63,701.27 × 12,885.50
4. Step 4: Simplify right side
   42,467.42x = 820,822,714.59
5. Step 5: Solve for x
   x = 820,822,714.59/42,467.42
6. Step 6: Final answer
   x = 19,328.29