Finding the Fourth Proportional to 645,100.52, 967,109.50 and 285,213.27

Step by Step Solution

1. Step 1: Write the proportion equation
   645,100.52 : 967,109.50 = 285,213.27 : x
2. Step 2: Convert to fraction form
   645,100.52/967,109.50 = 285,213.27/x
3. Step 3: Cross multiply
   645,100.52x = 967,109.50 × 285,213.27
4. Step 4: Simplify right side
   645,100.52x = 275,832,461,517.00
5. Step 5: Solve for x
   x = 275,832,461,517.00/645,100.52
6. Step 6: Final answer
   x = 427,580.59