Finding the Fourth Proportional to 42,976.78, 64,476.32 and 16,323.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42,976.78 : 64,476.32 = 16,323.21 : x
2. Step 2: Convert to fraction form
   42,976.78/64,476.32 = 16,323.21/x
3. Step 3: Cross multiply
   42,976.78x = 64,476.32 × 16,323.21
4. Step 4: Simplify right side
   42,976.78x = 1,052,460,429.77
5. Step 5: Solve for x
   x = 1,052,460,429.77/42,976.78
6. Step 6: Final answer
   x = 24,489.05