Finding the Fourth Proportional to 155,013.55, 213,911.69 and 87,029.27

Step by Step Solution

1. Step 1: Write the proportion equation
   155,013.55 : 213,911.69 = 87,029.27 : x
2. Step 2: Convert to fraction form
   155,013.55/213,911.69 = 87,029.27/x
3. Step 3: Cross multiply
   155,013.55x = 213,911.69 × 87,029.27
4. Step 4: Simplify right side
   155,013.55x = 18,616,577,522.63
5. Step 5: Solve for x
   x = 18,616,577,522.63/155,013.55
6. Step 6: Final answer
   x = 120,096.45