Finding the Fourth Proportional to 58,005.87, 86,920.24 and 43,142.91

Step by Step Solution

1. Step 1: Write the proportion equation
   58,005.87 : 86,920.24 = 43,142.91 : x
2. Step 2: Convert to fraction form
   58,005.87/86,920.24 = 43,142.91/x
3. Step 3: Cross multiply
   58,005.87x = 86,920.24 × 43,142.91
4. Step 4: Simplify right side
   58,005.87x = 3,749,992,091.50
5. Step 5: Solve for x
   x = 3,749,992,091.50/58,005.87
6. Step 6: Final answer
   x = 64,648.49