Finding the Fourth Proportional to 42,916.36, 64,297.34 and 40,384.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,916.36 : 64,297.34 = 40,384.15 : x
2. Step 2: Convert to fraction form
   42,916.36/64,297.34 = 40,384.15/x
3. Step 3: Cross multiply
   42,916.36x = 64,297.34 × 40,384.15
4. Step 4: Simplify right side
   42,916.36x = 2,596,593,665.14
5. Step 5: Solve for x
   x = 2,596,593,665.14/42,916.36
6. Step 6: Final answer
   x = 60,503.58