Finding the Fourth Proportional to 260,085.38, 390,141.56 and 82,606.28

Step by Step Solution

1. Step 1: Write the proportion equation
   260,085.38 : 390,141.56 = 82,606.28 : x
2. Step 2: Convert to fraction form
   260,085.38/390,141.56 = 82,606.28/x
3. Step 3: Cross multiply
   260,085.38x = 390,141.56 × 82,606.28
4. Step 4: Simplify right side
   260,085.38x = 32,228,142,945.00
5. Step 5: Solve for x
   x = 32,228,142,945.00/260,085.38
6. Step 6: Final answer
   x = 123,913.70