Finding the Fourth Proportional to 105,688.56, 145,845.61 and 63,270.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,688.56 : 145,845.61 = 63,270.48 : x
2. Step 2: Convert to fraction form
   105,688.56/145,845.61 = 63,270.48/x
3. Step 3: Cross multiply
   105,688.56x = 145,845.61 × 63,270.48
4. Step 4: Simplify right side
   105,688.56x = 9,227,721,750.59
5. Step 5: Solve for x
   x = 9,227,721,750.59/105,688.56
6. Step 6: Final answer
   x = 87,310.51