Finding the Fourth Proportional to 105,296.50, 145,308.90 and 57,550.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,296.50 : 145,308.90 = 57,550.17 : x
2. Step 2: Convert to fraction form
   105,296.50/145,308.90 = 57,550.17/x
3. Step 3: Cross multiply
   105,296.50x = 145,308.90 × 57,550.17
4. Step 4: Simplify right side
   105,296.50x = 8,362,551,897.51
5. Step 5: Solve for x
   x = 8,362,551,897.51/105,296.50
6. Step 6: Final answer
   x = 79,419.09