Finding the Fourth Proportional to 218,613.34, 327,870.80 and 142,687.98

Step by Step Solution

1. Step 1: Write the proportion equation
   218,613.34 : 327,870.80 = 142,687.98 : x
2. Step 2: Convert to fraction form
   218,613.34/327,870.80 = 142,687.98/x
3. Step 3: Cross multiply
   218,613.34x = 327,870.80 × 142,687.98
4. Step 4: Simplify right side
   218,613.34x = 46,783,222,152.98
5. Step 5: Solve for x
   x = 46,783,222,152.98/218,613.34
6. Step 6: Final answer
   x = 213,999.85