Finding the Fourth Proportional to 276,142.46, 414,218.81 and 86,598.61

Step by Step Solution

1. Step 1: Write the proportion equation
   276,142.46 : 414,218.81 = 86,598.61 : x
2. Step 2: Convert to fraction form
   276,142.46/414,218.81 = 86,598.61/x
3. Step 3: Cross multiply
   276,142.46x = 414,218.81 × 86,598.61
4. Step 4: Simplify right side
   276,142.46x = 35,870,772,362.80
5. Step 5: Solve for x
   x = 35,870,772,362.80/276,142.46
6. Step 6: Final answer
   x = 129,899.52