Finding the Fourth Proportional to 105,507.09, 145,560.04 and 69,228.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,507.09 : 145,560.04 = 69,228.56 : x
2. Step 2: Convert to fraction form
   105,507.09/145,560.04 = 69,228.56/x
3. Step 3: Cross multiply
   105,507.09x = 145,560.04 × 69,228.56
4. Step 4: Simplify right side
   105,507.09x = 10,076,912,153.57
5. Step 5: Solve for x
   x = 10,076,912,153.57/105,507.09
6. Step 6: Final answer
   x = 95,509.34