Finding the Fourth Proportional to 78,945.10, 109,016.99 and 50,699.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,945.10 : 109,016.99 = 50,699.99 : x
2. Step 2: Convert to fraction form
   78,945.10/109,016.99 = 50,699.99/x
3. Step 3: Cross multiply
   78,945.10x = 109,016.99 × 50,699.99
4. Step 4: Simplify right side
   78,945.10x = 5,527,160,512.00
5. Step 5: Solve for x
   x = 5,527,160,512.00/78,945.10
6. Step 6: Final answer
   x = 70,012.71