Finding the Fourth Proportional to 42,178.68, 63,205.56 and 18,464.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,178.68 : 63,205.56 = 18,464.31 : x
2. Step 2: Convert to fraction form
   42,178.68/63,205.56 = 18,464.31/x
3. Step 3: Cross multiply
   42,178.68x = 63,205.56 × 18,464.31
4. Step 4: Simplify right side
   42,178.68x = 1,167,047,053.56
5. Step 5: Solve for x
   x = 1,167,047,053.56/42,178.68
6. Step 6: Final answer
   x = 27,669.12