Finding the Fourth Proportional to 42,964.30, 64,414.05 and 28,176.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,964.30 : 64,414.05 = 28,176.94 : x
2. Step 2: Convert to fraction form
   42,964.30/64,414.05 = 28,176.94/x
3. Step 3: Cross multiply
   42,964.30x = 64,414.05 × 28,176.94
4. Step 4: Simplify right side
   42,964.30x = 1,814,990,822.01
5. Step 5: Solve for x
   x = 1,814,990,822.01/42,964.30
6. Step 6: Final answer
   x = 42,244.16