Finding the Fourth Proportional to 42,466.42, 63,699.77 and 12,884.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,466.42 : 63,699.77 = 12,884.50 : x
2. Step 2: Convert to fraction form
   42,466.42/63,699.77 = 12,884.50/x
3. Step 3: Cross multiply
   42,466.42x = 63,699.77 × 12,884.50
4. Step 4: Simplify right side
   42,466.42x = 820,739,686.57
5. Step 5: Solve for x
   x = 820,739,686.57/42,466.42
6. Step 6: Final answer
   x = 19,326.79