Finding the Fourth Proportional to 82,072.20, 113,287.50 and 51,051.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,072.20 : 113,287.50 = 51,051.72 : x
2. Step 2: Convert to fraction form
   82,072.20/113,287.50 = 51,051.72/x
3. Step 3: Cross multiply
   82,072.20x = 113,287.50 × 51,051.72
4. Step 4: Simplify right side
   82,072.20x = 5,783,521,729.50
5. Step 5: Solve for x
   x = 5,783,521,729.50/82,072.20
6. Step 6: Final answer
   x = 70,468.71