Finding the Fourth Proportional to 79,020.96, 109,005.90 and 50,730.90

Step by Step Solution

1. Step 1: Write the proportion equation
   79,020.96 : 109,005.90 = 50,730.90 : x
2. Step 2: Convert to fraction form
   79,020.96/109,005.90 = 50,730.90/x
3. Step 3: Cross multiply
   79,020.96x = 109,005.90 × 50,730.90
4. Step 4: Simplify right side
   79,020.96x = 5,529,967,412.31
5. Step 5: Solve for x
   x = 5,529,967,412.31/79,020.96
6. Step 6: Final answer
   x = 69,981.02