Finding the Fourth Proportional to 142,628.42, 213,929.88 and 42,810.90

Step by Step Solution

1. Step 1: Write the proportion equation
   142,628.42 : 213,929.88 = 42,810.90 : x
2. Step 2: Convert to fraction form
   142,628.42/213,929.88 = 42,810.90/x
3. Step 3: Cross multiply
   142,628.42x = 213,929.88 × 42,810.90
4. Step 4: Simplify right side
   142,628.42x = 9,158,530,699.69
5. Step 5: Solve for x
   x = 9,158,530,699.69/142,628.42
6. Step 6: Final answer
   x = 64,212.52