Finding the Fourth Proportional to 81,919.02, 113,056.77 and 50,109.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,919.02 : 113,056.77 = 50,109.10 : x
2. Step 2: Convert to fraction form
   81,919.02/113,056.77 = 50,109.10/x
3. Step 3: Cross multiply
   81,919.02x = 113,056.77 × 50,109.10
4. Step 4: Simplify right side
   81,919.02x = 5,665,172,993.61
5. Step 5: Solve for x
   x = 5,665,172,993.61/81,919.02
6. Step 6: Final answer
   x = 69,155.77