Finding the Fourth Proportional to 142,657.79, 213,990.58 and 42,817.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,657.79 : 213,990.58 = 42,817.98 : x
2. Step 2: Convert to fraction form
   142,657.79/213,990.58 = 42,817.98/x
3. Step 3: Cross multiply
   142,657.79x = 213,990.58 × 42,817.98
4. Step 4: Simplify right side
   142,657.79x = 9,162,644,989.76
5. Step 5: Solve for x
   x = 9,162,644,989.76/142,657.79
6. Step 6: Final answer
   x = 64,228.14