Finding the Fourth Proportional to 105,698.17, 145,870.23 and 69,825.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,698.17 : 145,870.23 = 69,825.30 : x
2. Step 2: Convert to fraction form
   105,698.17/145,870.23 = 69,825.30/x
3. Step 3: Cross multiply
   105,698.17x = 145,870.23 × 69,825.30
4. Step 4: Simplify right side
   105,698.17x = 10,185,432,570.82
5. Step 5: Solve for x
   x = 10,185,432,570.82/105,698.17
6. Step 6: Final answer
   x = 96,363.38