Finding the Fourth Proportional to 105,763.38, 145,953.69 and 58,017.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,763.38 : 145,953.69 = 58,017.12 : x
2. Step 2: Convert to fraction form
   105,763.38/145,953.69 = 58,017.12/x
3. Step 3: Cross multiply
   105,763.38x = 145,953.69 × 58,017.12
4. Step 4: Simplify right side
   105,763.38x = 8,467,812,747.17
5. Step 5: Solve for x
   x = 8,467,812,747.17/105,763.38
6. Step 6: Final answer
   x = 80,063.75