Finding the Fourth Proportional to 105,613.61, 145,744.52 and 57,865.93

Step by Step Solution

1. Step 1: Write the proportion equation
   105,613.61 : 145,744.52 = 57,865.93 : x
2. Step 2: Convert to fraction form
   105,613.61/145,744.52 = 57,865.93/x
3. Step 3: Cross multiply
   105,613.61x = 145,744.52 × 57,865.93
4. Step 4: Simplify right side
   105,613.61x = 8,433,641,538.51
5. Step 5: Solve for x
   x = 8,433,641,538.51/105,613.61
6. Step 6: Final answer
   x = 79,853.74