Finding the Fourth Proportional to 76,109.57, 105,028.62 and 42,119.49

Step by Step Solution

1. Step 1: Write the proportion equation
   76,109.57 : 105,028.62 = 42,119.49 : x
2. Step 2: Convert to fraction form
   76,109.57/105,028.62 = 42,119.49/x
3. Step 3: Cross multiply
   76,109.57x = 105,028.62 × 42,119.49
4. Step 4: Simplify right side
   76,109.57x = 4,423,751,909.80
5. Step 5: Solve for x
   x = 4,423,751,909.80/76,109.57
6. Step 6: Final answer
   x = 58,123.47