Finding the Fourth Proportional to 1,376.16, 1,898.94 and 816.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.16 : 1,898.94 = 816.69 : x
2. Step 2: Convert to fraction form
   1,376.16/1,898.94 = 816.69/x
3. Step 3: Cross multiply
   1,376.16x = 1,898.94 × 816.69
4. Step 4: Simplify right side
   1,376.16x = 1,550,845.31
5. Step 5: Solve for x
   x = 1,550,845.31/1,376.16
6. Step 6: Final answer
   x = 1,126.94