Finding the Fourth Proportional to 105,243.84, 145,159.20 and 69,461.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,243.84 : 145,159.20 = 69,461.28 : x
2. Step 2: Convert to fraction form
   105,243.84/145,159.20 = 69,461.28/x
3. Step 3: Cross multiply
   105,243.84x = 145,159.20 × 69,461.28
4. Step 4: Simplify right side
   105,243.84x = 10,082,943,835.78
5. Step 5: Solve for x
   x = 10,082,943,835.78/105,243.84
6. Step 6: Final answer
   x = 95,805.55