Finding the Fourth Proportional to 145,915.85, 218,808.17 and 141,323.15

Step by Step Solution

1. Step 1: Write the proportion equation
   145,915.85 : 218,808.17 = 141,323.15 : x
2. Step 2: Convert to fraction form
   145,915.85/218,808.17 = 141,323.15/x
3. Step 3: Cross multiply
   145,915.85x = 218,808.17 × 141,323.15
4. Step 4: Simplify right side
   145,915.85x = 30,922,660,200.50
5. Step 5: Solve for x
   x = 30,922,660,200.50/145,915.85
6. Step 6: Final answer
   x = 211,921.18