Finding the Fourth Proportional to 76,131.25, 105,057.81 and 42,137.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,131.25 : 105,057.81 = 42,137.71 : x
2. Step 2: Convert to fraction form
   76,131.25/105,057.81 = 42,137.71/x
3. Step 3: Cross multiply
   76,131.25x = 105,057.81 × 42,137.71
4. Step 4: Simplify right side
   76,131.25x = 4,426,895,859.32
5. Step 5: Solve for x
   x = 4,426,895,859.32/76,131.25
6. Step 6: Final answer
   x = 58,148.21