Finding the Fourth Proportional to 105,209.08, 145,188.59 and 57,462.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,209.08 : 145,188.59 = 57,462.62 : x
2. Step 2: Convert to fraction form
   105,209.08/145,188.59 = 57,462.62/x
3. Step 3: Cross multiply
   105,209.08x = 145,188.59 × 57,462.62
4. Step 4: Simplify right side
   105,209.08x = 8,342,915,762.25
5. Step 5: Solve for x
   x = 8,342,915,762.25/105,209.08
6. Step 6: Final answer
   x = 79,298.44