Finding the Fourth Proportional to 282,868.10, 390,357.98 and 155,543.69

Step by Step Solution

1. Step 1: Write the proportion equation
   282,868.10 : 390,357.98 = 155,543.69 : x
2. Step 2: Convert to fraction form
   282,868.10/390,357.98 = 155,543.69/x
3. Step 3: Cross multiply
   282,868.10x = 390,357.98 × 155,543.69
4. Step 4: Simplify right side
   282,868.10x = 60,717,721,411.61
5. Step 5: Solve for x
   x = 60,717,721,411.61/282,868.10
6. Step 6: Final answer
   x = 214,650.30