Finding the Fourth Proportional to 105,335.83, 145,488.12 and 71,285.27

Step by Step Solution

1. Step 1: Write the proportion equation
   105,335.83 : 145,488.12 = 71,285.27 : x
2. Step 2: Convert to fraction form
   105,335.83/145,488.12 = 71,285.27/x
3. Step 3: Cross multiply
   105,335.83x = 145,488.12 × 71,285.27
4. Step 4: Simplify right side
   105,335.83x = 10,371,159,522.70
5. Step 5: Solve for x
   x = 10,371,159,522.70/105,335.83
6. Step 6: Final answer
   x = 98,458.04