Finding the Fourth Proportional to 142,818.69, 214,258.01 and 42,986.19

Step by Step Solution

1. Step 1: Write the proportion equation
   142,818.69 : 214,258.01 = 42,986.19 : x
2. Step 2: Convert to fraction form
   142,818.69/214,258.01 = 42,986.19/x
3. Step 3: Cross multiply
   142,818.69x = 214,258.01 × 42,986.19
4. Step 4: Simplify right side
   142,818.69x = 9,210,135,311.95
5. Step 5: Solve for x
   x = 9,210,135,311.95/142,818.69
6. Step 6: Final answer
   x = 64,488.31