Finding the Fourth Proportional to 142,405.68, 213,619.92 and 42,558.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,405.68 : 213,619.92 = 42,558.60 : x
2. Step 2: Convert to fraction form
   142,405.68/213,619.92 = 42,558.60/x
3. Step 3: Cross multiply
   142,405.68x = 213,619.92 × 42,558.60
4. Step 4: Simplify right side
   142,405.68x = 9,091,364,727.31
5. Step 5: Solve for x
   x = 9,091,364,727.31/142,405.68
6. Step 6: Final answer
   x = 63,841.31