Finding the Fourth Proportional to 282,100.88, 389,299.72 and 154,777.40

Step by Step Solution

1. Step 1: Write the proportion equation
   282,100.88 : 389,299.72 = 154,777.40 : x
2. Step 2: Convert to fraction form
   282,100.88/389,299.72 = 154,777.40/x
3. Step 3: Cross multiply
   282,100.88x = 389,299.72 × 154,777.40
4. Step 4: Simplify right side
   282,100.88x = 60,254,798,482.33
5. Step 5: Solve for x
   x = 60,254,798,482.33/282,100.88
6. Step 6: Final answer
   x = 213,593.09