Finding the Fourth Proportional to 81,981.10, 113,138.14 and 50,140

Step by Step Solution

1. Step 1: Write the proportion equation
   81,981.10 : 113,138.14 = 50,140 : x
2. Step 2: Convert to fraction form
   81,981.10/113,138.14 = 50,140/x
3. Step 3: Cross multiply
   81,981.10x = 113,138.14 × 50,140
4. Step 4: Simplify right side
   81,981.10x = 5,672,746,339.60
5. Step 5: Solve for x
   x = 5,672,746,339.60/81,981.10
6. Step 6: Final answer
   x = 69,195.78