Finding the Fourth Proportional to 105,496.81, 145,587.30 and 57,749.33

Step by Step Solution

1. Step 1: Write the proportion equation
   105,496.81 : 145,587.30 = 57,749.33 : x
2. Step 2: Convert to fraction form
   105,496.81/145,587.30 = 57,749.33/x
3. Step 3: Cross multiply
   105,496.81x = 145,587.30 × 57,749.33
4. Step 4: Simplify right side
   105,496.81x = 8,407,569,031.51
5. Step 5: Solve for x
   x = 8,407,569,031.51/105,496.81
6. Step 6: Final answer
   x = 79,695.01