Finding the Fourth Proportional to 58,707.89, 81,074.43 and 40,605

Step by Step Solution

1. Step 1: Write the proportion equation
   58,707.89 : 81,074.43 = 40,605 : x
2. Step 2: Convert to fraction form
   58,707.89/81,074.43 = 40,605/x
3. Step 3: Cross multiply
   58,707.89x = 81,074.43 × 40,605
4. Step 4: Simplify right side
   58,707.89x = 3,292,027,230.15
5. Step 5: Solve for x
   x = 3,292,027,230.15/58,707.89
6. Step 6: Final answer
   x = 56,074.70