Finding the Fourth Proportional to 51,137.69, 70,551.28 and 30,980.03

Step by Step Solution

1. Step 1: Write the proportion equation
   51,137.69 : 70,551.28 = 30,980.03 : x
2. Step 2: Convert to fraction form
   51,137.69/70,551.28 = 30,980.03/x
3. Step 3: Cross multiply
   51,137.69x = 70,551.28 × 30,980.03
4. Step 4: Simplify right side
   51,137.69x = 2,185,680,770.94
5. Step 5: Solve for x
   x = 2,185,680,770.94/51,137.69
6. Step 6: Final answer
   x = 42,741.09