Finding the Fourth Proportional to 105,770.24, 145,969.72 and 69,897.36

Step by Step Solution

1. Step 1: Write the proportion equation
   105,770.24 : 145,969.72 = 69,897.36 : x
2. Step 2: Convert to fraction form
   105,770.24/145,969.72 = 69,897.36/x
3. Step 3: Cross multiply
   105,770.24x = 145,969.72 × 69,897.36
4. Step 4: Simplify right side
   105,770.24x = 10,202,898,067.94
5. Step 5: Solve for x
   x = 10,202,898,067.94/105,770.24
6. Step 6: Final answer
   x = 96,462.84