Finding the Fourth Proportional to 76,130.30, 105,058.05 and 42,136.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,130.30 : 105,058.05 = 42,136.71 : x
2. Step 2: Convert to fraction form
   76,130.30/105,058.05 = 42,136.71/x
3. Step 3: Cross multiply
   76,130.30x = 105,058.05 × 42,136.71
4. Step 4: Simplify right side
   76,130.30x = 4,426,800,586.02
5. Step 5: Solve for x
   x = 4,426,800,586.02/76,130.30
6. Step 6: Final answer
   x = 58,147.69