Finding the Fourth Proportional to 275,113.72, 412,588.34 and 82,980.10

Step by Step Solution

1. Step 1: Write the proportion equation
   275,113.72 : 412,588.34 = 82,980.10 : x
2. Step 2: Convert to fraction form
   275,113.72/412,588.34 = 82,980.10/x
3. Step 3: Cross multiply
   275,113.72x = 412,588.34 × 82,980.10
4. Step 4: Simplify right side
   275,113.72x = 34,236,621,712.03
5. Step 5: Solve for x
   x = 34,236,621,712.03/275,113.72
6. Step 6: Final answer
   x = 124,445.34