Finding the Fourth Proportional to 42,980.28, 64,481.60 and 16,326.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,980.28 : 64,481.60 = 16,326.78 : x
2. Step 2: Convert to fraction form
   42,980.28/64,481.60 = 16,326.78/x
3. Step 3: Cross multiply
   42,980.28x = 64,481.60 × 16,326.78
4. Step 4: Simplify right side
   42,980.28x = 1,052,776,897.25
5. Step 5: Solve for x
   x = 1,052,776,897.25/42,980.28
6. Step 6: Final answer
   x = 24,494.42