Finding the Fourth Proportional to 40,705.33, 56,145.31 and 28,631.42

Step by Step Solution

1. Step 1: Write the proportion equation
   40,705.33 : 56,145.31 = 28,631.42 : x
2. Step 2: Convert to fraction form
   40,705.33/56,145.31 = 28,631.42/x
3. Step 3: Cross multiply
   40,705.33x = 56,145.31 × 28,631.42
4. Step 4: Simplify right side
   40,705.33x = 1,607,519,808.48
5. Step 5: Solve for x
   x = 1,607,519,808.48/40,705.33
6. Step 6: Final answer
   x = 39,491.63