Finding the Fourth Proportional to 142,270.08, 213,400.50 and 42,431.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,270.08 : 213,400.50 = 42,431.10 : x
2. Step 2: Convert to fraction form
   142,270.08/213,400.50 = 42,431.10/x
3. Step 3: Cross multiply
   142,270.08x = 213,400.50 × 42,431.10
4. Step 4: Simplify right side
   142,270.08x = 9,054,817,955.55
5. Step 5: Solve for x
   x = 9,054,817,955.55/142,270.08
6. Step 6: Final answer
   x = 63,645.27