Finding the Fourth Proportional to 42,469.89, 63,701.58 and 12,887.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,469.89 : 63,701.58 = 12,887.88 : x
2. Step 2: Convert to fraction form
   42,469.89/63,701.58 = 12,887.88/x
3. Step 3: Cross multiply
   42,469.89x = 63,701.58 × 12,887.88
4. Step 4: Simplify right side
   42,469.89x = 820,978,318.85
5. Step 5: Solve for x
   x = 820,978,318.85/42,469.89
6. Step 6: Final answer
   x = 19,330.83