Finding the Fourth Proportional to 32,542.56, 45,138.78 and 31,678.87

Step by Step Solution

1. Step 1: Write the proportion equation
   32,542.56 : 45,138.78 = 31,678.87 : x
2. Step 2: Convert to fraction form
   32,542.56/45,138.78 = 31,678.87/x
3. Step 3: Cross multiply
   32,542.56x = 45,138.78 × 31,678.87
4. Step 4: Simplify right side
   32,542.56x = 1,429,945,451.34
5. Step 5: Solve for x
   x = 1,429,945,451.34/32,542.56
6. Step 6: Final answer
   x = 43,940.78