Finding the Fourth Proportional to 42,662.16, 63,905.76 and 28,578.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,662.16 : 63,905.76 = 28,578.96 : x
2. Step 2: Convert to fraction form
   42,662.16/63,905.76 = 28,578.96/x
3. Step 3: Cross multiply
   42,662.16x = 63,905.76 × 28,578.96
4. Step 4: Simplify right side
   42,662.16x = 1,826,360,158.81
5. Step 5: Solve for x
   x = 1,826,360,158.81/42,662.16
6. Step 6: Final answer
   x = 42,809.84