Finding the Fourth Proportional to 260,210.31, 390,231.86 and 82,675.83

Step by Step Solution

1. Step 1: Write the proportion equation
   260,210.31 : 390,231.86 = 82,675.83 : x
2. Step 2: Convert to fraction form
   260,210.31/390,231.86 = 82,675.83/x
3. Step 3: Cross multiply
   260,210.31x = 390,231.86 × 82,675.83
4. Step 4: Simplify right side
   260,210.31x = 32,262,742,917.94
5. Step 5: Solve for x
   x = 32,262,742,917.94/260,210.31
6. Step 6: Final answer
   x = 123,987.18