Finding the Fourth Proportional to 86,643.27, 129,968.55 and 42,309.14

Step by Step Solution

1. Step 1: Write the proportion equation
   86,643.27 : 129,968.55 = 42,309.14 : x
2. Step 2: Convert to fraction form
   86,643.27/129,968.55 = 42,309.14/x
3. Step 3: Cross multiply
   86,643.27x = 129,968.55 × 42,309.14
4. Step 4: Simplify right side
   86,643.27x = 5,498,856,927.70
5. Step 5: Solve for x
   x = 5,498,856,927.70/86,643.27
6. Step 6: Final answer
   x = 63,465.48