Finding the Fourth Proportional to 105,723.20, 145,904.76 and 69,850.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,723.20 : 145,904.76 = 69,850.28 : x
2. Step 2: Convert to fraction form
   105,723.20/145,904.76 = 69,850.28/x
3. Step 3: Cross multiply
   105,723.20x = 145,904.76 × 69,850.28
4. Step 4: Simplify right side
   105,723.20x = 10,191,488,339.33
5. Step 5: Solve for x
   x = 10,191,488,339.33/105,723.20
6. Step 6: Final answer
   x = 96,397.84