Finding the Fourth Proportional to 282,692.50, 390,111.25 and 155,365.36

Step by Step Solution

1. Step 1: Write the proportion equation
   282,692.50 : 390,111.25 = 155,365.36 : x
2. Step 2: Convert to fraction form
   282,692.50/390,111.25 = 155,365.36/x
3. Step 3: Cross multiply
   282,692.50x = 390,111.25 × 155,365.36
4. Step 4: Simplify right side
   282,692.50x = 60,609,774,796.30
5. Step 5: Solve for x
   x = 60,609,774,796.30/282,692.50
6. Step 6: Final answer
   x = 214,401.78