Finding the Fourth Proportional to 158,505.33, 218,740.01 and 85,910.56

Step by Step Solution

1. Step 1: Write the proportion equation
   158,505.33 : 218,740.01 = 85,910.56 : x
2. Step 2: Convert to fraction form
   158,505.33/218,740.01 = 85,910.56/x
3. Step 3: Cross multiply
   158,505.33x = 218,740.01 × 85,910.56
4. Step 4: Simplify right side
   158,505.33x = 18,792,075,777.10
5. Step 5: Solve for x
   x = 18,792,075,777.10/158,505.33
6. Step 6: Final answer
   x = 118,558.01