Finding the Fourth Proportional to 131,112.69, 196,639.75 and 51,152.78

Step by Step Solution

1. Step 1: Write the proportion equation
   131,112.69 : 196,639.75 = 51,152.78 : x
2. Step 2: Convert to fraction form
   131,112.69/196,639.75 = 51,152.78/x
3. Step 3: Cross multiply
   131,112.69x = 196,639.75 × 51,152.78
4. Step 4: Simplify right side
   131,112.69x = 10,058,670,426.55
5. Step 5: Solve for x
   x = 10,058,670,426.55/131,112.69
6. Step 6: Final answer
   x = 76,717.75