Finding the Fourth Proportional to 105,297, 145,309.59 and 57,550.68

Step by Step Solution

1. Step 1: Write the proportion equation
   105,297 : 145,309.59 = 57,550.68 : x
2. Step 2: Convert to fraction form
   105,297/145,309.59 = 57,550.68/x
3. Step 3: Cross multiply
   105,297x = 145,309.59 × 57,550.68
4. Step 4: Simplify right side
   105,297x = 8,362,665,715.02
5. Step 5: Solve for x
   x = 8,362,665,715.02/105,297
6. Step 6: Final answer
   x = 79,419.79