Finding the Fourth Proportional to 42,642.89, 58,871.28 and 28,327.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,642.89 : 58,871.28 = 28,327.26 : x
2. Step 2: Convert to fraction form
   42,642.89/58,871.28 = 28,327.26/x
3. Step 3: Cross multiply
   42,642.89x = 58,871.28 × 28,327.26
4. Step 4: Simplify right side
   42,642.89x = 1,667,662,055.09
5. Step 5: Solve for x
   x = 1,667,662,055.09/42,642.89
6. Step 6: Final answer
   x = 39,107.62