Finding the Fourth Proportional to 158,607.31, 218,880.90 and 86,986.69

Step by Step Solution

1. Step 1: Write the proportion equation
   158,607.31 : 218,880.90 = 86,986.69 : x
2. Step 2: Convert to fraction form
   158,607.31/218,880.90 = 86,986.69/x
3. Step 3: Cross multiply
   158,607.31x = 218,880.90 × 86,986.69
4. Step 4: Simplify right side
   158,607.31x = 19,039,724,995.22
5. Step 5: Solve for x
   x = 19,039,724,995.22/158,607.31
6. Step 6: Final answer
   x = 120,043.17