Finding the Fourth Proportional to 105,409.24, 145,498.62 and 69,631

Step by Step Solution

1. Step 1: Write the proportion equation
   105,409.24 : 145,498.62 = 69,631 : x
2. Step 2: Convert to fraction form
   105,409.24/145,498.62 = 69,631/x
3. Step 3: Cross multiply
   105,409.24x = 145,498.62 × 69,631
4. Step 4: Simplify right side
   105,409.24x = 10,131,214,409.22
5. Step 5: Solve for x
   x = 10,131,214,409.22/105,409.24
6. Step 6: Final answer
   x = 96,113.15