Finding the Fourth Proportional to 42,022.17, 63,014.76 and 12,442.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,022.17 : 63,014.76 = 12,442.28 : x
2. Step 2: Convert to fraction form
   42,022.17/63,014.76 = 12,442.28/x
3. Step 3: Cross multiply
   42,022.17x = 63,014.76 × 12,442.28
4. Step 4: Simplify right side
   42,022.17x = 784,046,972.98
5. Step 5: Solve for x
   x = 784,046,972.98/42,022.17
6. Step 6: Final answer
   x = 18,657.94