Finding the Fourth Proportional to 81,820.39, 112,920.69 and 50,010.49

Step by Step Solution

1. Step 1: Write the proportion equation
   81,820.39 : 112,920.69 = 50,010.49 : x
2. Step 2: Convert to fraction form
   81,820.39/112,920.69 = 50,010.49/x
3. Step 3: Cross multiply
   81,820.39x = 112,920.69 × 50,010.49
4. Step 4: Simplify right side
   81,820.39x = 5,647,219,038.04
5. Step 5: Solve for x
   x = 5,647,219,038.04/81,820.39
6. Step 6: Final answer
   x = 69,019.70