Finding the Fourth Proportional to 1,856.50, 2,783.59 and 606.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.50 : 2,783.59 = 606.67 : x
2. Step 2: Convert to fraction form
   1,856.50/2,783.59 = 606.67/x
3. Step 3: Cross multiply
   1,856.50x = 2,783.59 × 606.67
4. Step 4: Simplify right side
   1,856.50x = 1,688,720.55
5. Step 5: Solve for x
   x = 1,688,720.55/1,856.50
6. Step 6: Final answer
   x = 909.63