Finding the Fourth Proportional to 1,400.95, 2,100.72 and 816.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.95 : 2,100.72 = 816.14 : x
2. Step 2: Convert to fraction form
   1,400.95/2,100.72 = 816.14/x
3. Step 3: Cross multiply
   1,400.95x = 2,100.72 × 816.14
4. Step 4: Simplify right side
   1,400.95x = 1,714,481.62
5. Step 5: Solve for x
   x = 1,714,481.62/1,400.95
6. Step 6: Final answer
   x = 1,223.80