Finding the Fourth Proportional to 42,665.80, 64,008.96 and 16,370.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.80 : 64,008.96 = 16,370.54 : x
2. Step 2: Convert to fraction form
   42,665.80/64,008.96 = 16,370.54/x
3. Step 3: Cross multiply
   42,665.80x = 64,008.96 × 16,370.54
4. Step 4: Simplify right side
   42,665.80x = 1,047,861,414.72
5. Step 5: Solve for x
   x = 1,047,861,414.72/42,665.80
6. Step 6: Final answer
   x = 24,559.75