Finding the Fourth Proportional to 42,128.35, 63,043.81 and 39,730.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.35 : 63,043.81 = 39,730.48 : x
2. Step 2: Convert to fraction form
   42,128.35/63,043.81 = 39,730.48/x
3. Step 3: Cross multiply
   42,128.35x = 63,043.81 × 39,730.48
4. Step 4: Simplify right side
   42,128.35x = 2,504,760,832.33
5. Step 5: Solve for x
   x = 2,504,760,832.33/42,128.35
6. Step 6: Final answer
   x = 59,455.47