Finding the Fourth Proportional to 105,290.54, 145,310.31 and 59,958.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,290.54 : 145,310.31 = 59,958.62 : x
2. Step 2: Convert to fraction form
   105,290.54/145,310.31 = 59,958.62/x
3. Step 3: Cross multiply
   105,290.54x = 145,310.31 × 59,958.62
4. Step 4: Simplify right side
   105,290.54x = 8,712,605,659.37
5. Step 5: Solve for x
   x = 8,712,605,659.37/105,290.54
6. Step 6: Final answer
   x = 82,748.23