Finding the Fourth Proportional to 105,661.67, 145,817.62 and 63,212.00

Step by Step Solution

1. Step 1: Write the proportion equation
   105,661.67 : 145,817.62 = 63,212.00 : x
2. Step 2: Convert to fraction form
   105,661.67/145,817.62 = 63,212.00/x
3. Step 3: Cross multiply
   105,661.67x = 145,817.62 × 63,212.00
4. Step 4: Simplify right side
   105,661.67x = 9,217,422,508.32
5. Step 5: Solve for x
   x = 9,217,422,508.32/105,661.67
6. Step 6: Final answer
   x = 87,235.26