Finding the Fourth Proportional to 158,537.37, 218,775.77 and 86,915.82

Step by Step Solution

1. Step 1: Write the proportion equation
   158,537.37 : 218,775.77 = 86,915.82 : x
2. Step 2: Convert to fraction form
   158,537.37/218,775.77 = 86,915.82/x
3. Step 3: Cross multiply
   158,537.37x = 218,775.77 × 86,915.82
4. Step 4: Simplify right side
   158,537.37x = 19,015,075,011.10
5. Step 5: Solve for x
   x = 19,015,075,011.10/158,537.37
6. Step 6: Final answer
   x = 119,940.65