Finding the Fourth Proportional to 260,667.96, 390,995.10 and 83,185.80

Step by Step Solution

1. Step 1: Write the proportion equation
   260,667.96 : 390,995.10 = 83,185.80 : x
2. Step 2: Convert to fraction form
   260,667.96/390,995.10 = 83,185.80/x
3. Step 3: Cross multiply
   260,667.96x = 390,995.10 × 83,185.80
4. Step 4: Simplify right side
   260,667.96x = 32,525,240,189.58
5. Step 5: Solve for x
   x = 32,525,240,189.58/260,667.96
6. Step 6: Final answer
   x = 124,776.52