Finding the Fourth Proportional to 260,462.72, 390,753 and 82,979.84

Step by Step Solution

1. Step 1: Write the proportion equation
   260,462.72 : 390,753 = 82,979.84 : x
2. Step 2: Convert to fraction form
   260,462.72/390,753 = 82,979.84/x
3. Step 3: Cross multiply
   260,462.72x = 390,753 × 82,979.84
4. Step 4: Simplify right side
   260,462.72x = 32,424,621,419.52
5. Step 5: Solve for x
   x = 32,424,621,419.52/260,462.72
6. Step 6: Final answer
   x = 124,488.53