Finding the Fourth Proportional to 142,258.86, 213,386.16 and 42,419.47

Step by Step Solution

1. Step 1: Write the proportion equation
   142,258.86 : 213,386.16 = 42,419.47 : x
2. Step 2: Convert to fraction form
   142,258.86/213,386.16 = 42,419.47/x
3. Step 3: Cross multiply
   142,258.86x = 213,386.16 × 42,419.47
4. Step 4: Simplify right side
   142,258.86x = 9,051,727,812.54
5. Step 5: Solve for x
   x = 9,051,727,812.54/142,258.86
6. Step 6: Final answer
   x = 63,628.57