Finding the Fourth Proportional to 42,022.89, 63,034.17 and 12,438.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,022.89 : 63,034.17 = 12,438.32 : x
2. Step 2: Convert to fraction form
   42,022.89/63,034.17 = 12,438.32/x
3. Step 3: Cross multiply
   42,022.89x = 63,034.17 × 12,438.32
4. Step 4: Simplify right side
   42,022.89x = 784,038,862.22
5. Step 5: Solve for x
   x = 784,038,862.22/42,022.89
6. Step 6: Final answer
   x = 18,657.42