Finding the Fourth Proportional to 58,579.30, 80,839.42 and 31,721.81

Step by Step Solution

1. Step 1: Write the proportion equation
   58,579.30 : 80,839.42 = 31,721.81 : x
2. Step 2: Convert to fraction form
   58,579.30/80,839.42 = 31,721.81/x
3. Step 3: Cross multiply
   58,579.30x = 80,839.42 × 31,721.81
4. Step 4: Simplify right side
   58,579.30x = 2,564,372,238.25
5. Step 5: Solve for x
   x = 2,564,372,238.25/58,579.30
6. Step 6: Final answer
   x = 43,776.08