Finding the Fourth Proportional to 86,608.84, 129,964.20 and 55,017.52

Step by Step Solution

1. Step 1: Write the proportion equation
   86,608.84 : 129,964.20 = 55,017.52 : x
2. Step 2: Convert to fraction form
   86,608.84/129,964.20 = 55,017.52/x
3. Step 3: Cross multiply
   86,608.84x = 129,964.20 × 55,017.52
4. Step 4: Simplify right side
   86,608.84x = 7,150,307,972.78
5. Step 5: Solve for x
   x = 7,150,307,972.78/86,608.84
6. Step 6: Final answer
   x = 82,558.64