Finding the Fourth Proportional to 105,697.17, 145,868.85 and 69,824.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,697.17 : 145,868.85 = 69,824.30 : x
2. Step 2: Convert to fraction form
   105,697.17/145,868.85 = 69,824.30/x
3. Step 3: Cross multiply
   105,697.17x = 145,868.85 × 69,824.30
4. Step 4: Simplify right side
   105,697.17x = 10,185,189,613.71
5. Step 5: Solve for x
   x = 10,185,189,613.71/105,697.17
6. Step 6: Final answer
   x = 96,361.99