Finding the Fourth Proportional to 105,495.72, 145,582.98 and 57,749.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,495.72 : 145,582.98 = 57,749.16 : x
2. Step 2: Convert to fraction form
   105,495.72/145,582.98 = 57,749.16/x
3. Step 3: Cross multiply
   105,495.72x = 145,582.98 × 57,749.16
4. Step 4: Simplify right side
   105,495.72x = 8,407,294,805.30
5. Step 5: Solve for x
   x = 8,407,294,805.30/105,495.72
6. Step 6: Final answer
   x = 79,693.23