Finding the Fourth Proportional to 2,117.02, 3,176.34 and 818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.02 : 3,176.34 = 818.50 : x
2. Step 2: Convert to fraction form
   2,117.02/3,176.34 = 818.50/x
3. Step 3: Cross multiply
   2,117.02x = 3,176.34 × 818.50
4. Step 4: Simplify right side
   2,117.02x = 2,599,834.29
5. Step 5: Solve for x
   x = 2,599,834.29/2,117.02
6. Step 6: Final answer
   x = 1,228.06