Finding the Fourth Proportional to 105,287.75, 145,304.10 and 59,358.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,287.75 : 145,304.10 = 59,358.72 : x
2. Step 2: Convert to fraction form
   105,287.75/145,304.10 = 59,358.72/x
3. Step 3: Cross multiply
   105,287.75x = 145,304.10 × 59,358.72
4. Step 4: Simplify right side
   105,287.75x = 8,625,065,386.75
5. Step 5: Solve for x
   x = 8,625,065,386.75/105,287.75
6. Step 6: Final answer
   x = 81,918.99