Finding the Fourth Proportional to 282,478, 389,820 and 155,156.08

Step by Step Solution

1. Step 1: Write the proportion equation
   282,478 : 389,820 = 155,156.08 : x
2. Step 2: Convert to fraction form
   282,478/389,820 = 155,156.08/x
3. Step 3: Cross multiply
   282,478x = 389,820 × 155,156.08
4. Step 4: Simplify right side
   282,478x = 60,482,943,105.60
5. Step 5: Solve for x
   x = 60,482,943,105.60/282,478
6. Step 6: Final answer
   x = 214,115.59