Finding the Fourth Proportional to 142,328.55, 213,485.54 and 42,489.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,328.55 : 213,485.54 = 42,489.57 : x
2. Step 2: Convert to fraction form
   142,328.55/213,485.54 = 42,489.57/x
3. Step 3: Cross multiply
   142,328.55x = 213,485.54 × 42,489.57
4. Step 4: Simplify right side
   142,328.55x = 9,070,908,795.82
5. Step 5: Solve for x
   x = 9,070,908,795.82/142,328.55
6. Step 6: Final answer
   x = 63,732.18