Finding the Fourth Proportional to 42,729.33, 58,932.86 and 39,864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,729.33 : 58,932.86 = 39,864.56 : x
2. Step 2: Convert to fraction form
   42,729.33/58,932.86 = 39,864.56/x
3. Step 3: Cross multiply
   42,729.33x = 58,932.86 × 39,864.56
4. Step 4: Simplify right side
   42,729.33x = 2,349,332,481.45
5. Step 5: Solve for x
   x = 2,349,332,481.45/42,729.33
6. Step 6: Final answer
   x = 54,981.73