Finding the Fourth Proportional to 105,196.83, 145,172.16 and 57,450.18

Step by Step Solution

1. Step 1: Write the proportion equation
   105,196.83 : 145,172.16 = 57,450.18 : x
2. Step 2: Convert to fraction form
   105,196.83/145,172.16 = 57,450.18/x
3. Step 3: Cross multiply
   105,196.83x = 145,172.16 × 57,450.18
4. Step 4: Simplify right side
   105,196.83x = 8,340,166,722.99
5. Step 5: Solve for x
   x = 8,340,166,722.99/105,196.83
6. Step 6: Final answer
   x = 79,281.54