Finding the Fourth Proportional to 42,669.61, 64,012.67 and 16,372.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,669.61 : 64,012.67 = 16,372.31 : x
2. Step 2: Convert to fraction form
   42,669.61/64,012.67 = 16,372.31/x
3. Step 3: Cross multiply
   42,669.61x = 64,012.67 × 16,372.31
4. Step 4: Simplify right side
   42,669.61x = 1,048,034,936.64
5. Step 5: Solve for x
   x = 1,048,034,936.64/42,669.61
6. Step 6: Final answer
   x = 24,561.63