Finding the Fourth Proportional to 78,841.69, 108,813.99 and 50,131.43

Step by Step Solution

1. Step 1: Write the proportion equation
   78,841.69 : 108,813.99 = 50,131.43 : x
2. Step 2: Convert to fraction form
   78,841.69/108,813.99 = 50,131.43/x
3. Step 3: Cross multiply
   78,841.69x = 108,813.99 × 50,131.43
4. Step 4: Simplify right side
   78,841.69x = 5,455,000,378.64
5. Step 5: Solve for x
   x = 5,455,000,378.64/78,841.69
6. Step 6: Final answer
   x = 69,189.29