Finding the Fourth Proportional to 155,419.34, 214,478.34 and 87,436.34

Step by Step Solution

1. Step 1: Write the proportion equation
   155,419.34 : 214,478.34 = 87,436.34 : x
2. Step 2: Convert to fraction form
   155,419.34/214,478.34 = 87,436.34/x
3. Step 3: Cross multiply
   155,419.34x = 214,478.34 × 87,436.34
4. Step 4: Simplify right side
   155,419.34x = 18,753,201,058.88
5. Step 5: Solve for x
   x = 18,753,201,058.88/155,419.34
6. Step 6: Final answer
   x = 120,661.95