Finding the Fourth Proportional to 1,364.16, 2,046.18 and 816.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,364.16 : 2,046.18 = 816.72 : x
2. Step 2: Convert to fraction form
   1,364.16/2,046.18 = 816.72/x
3. Step 3: Cross multiply
   1,364.16x = 2,046.18 × 816.72
4. Step 4: Simplify right side
   1,364.16x = 1,671,156.13
5. Step 5: Solve for x
   x = 1,671,156.13/1,364.16
6. Step 6: Final answer
   x = 1,225.04