Finding the Fourth Proportional to 105,885.47, 146,126.72 and 63,443.09

Step by Step Solution

1. Step 1: Write the proportion equation
   105,885.47 : 146,126.72 = 63,443.09 : x
2. Step 2: Convert to fraction form
   105,885.47/146,126.72 = 63,443.09/x
3. Step 3: Cross multiply
   105,885.47x = 146,126.72 × 63,443.09
4. Step 4: Simplify right side
   105,885.47x = 9,270,730,331.15
5. Step 5: Solve for x
   x = 9,270,730,331.15/105,885.47
6. Step 6: Final answer
   x = 87,554.32