Finding the Fourth Proportional to 76,136.47, 105,067.06 and 42,144.23

Step by Step Solution

1. Step 1: Write the proportion equation
   76,136.47 : 105,067.06 = 42,144.23 : x
2. Step 2: Convert to fraction form
   76,136.47/105,067.06 = 42,144.23/x
3. Step 3: Cross multiply
   76,136.47x = 105,067.06 × 42,144.23
4. Step 4: Simplify right side
   76,136.47x = 4,427,970,056.12
5. Step 5: Solve for x
   x = 4,427,970,056.12/76,136.47
6. Step 6: Final answer
   x = 58,158.33