Finding the Fourth Proportional to 76,371, 105,393.42 and 42,839.16

Step by Step Solution

1. Step 1: Write the proportion equation
   76,371 : 105,393.42 = 42,839.16 : x
2. Step 2: Convert to fraction form
   76,371/105,393.42 = 42,839.16/x
3. Step 3: Cross multiply
   76,371x = 105,393.42 × 42,839.16
4. Step 4: Simplify right side
   76,371x = 4,514,965,582.33
5. Step 5: Solve for x
   x = 4,514,965,582.33/76,371
6. Step 6: Final answer
   x = 59,118.85