Finding the Fourth Proportional to 1,376.29, 1,898.59 and 816.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.29 : 1,898.59 = 816.51 : x
2. Step 2: Convert to fraction form
   1,376.29/1,898.59 = 816.51/x
3. Step 3: Cross multiply
   1,376.29x = 1,898.59 × 816.51
4. Step 4: Simplify right side
   1,376.29x = 1,550,213.64
5. Step 5: Solve for x
   x = 1,550,213.64/1,376.29
6. Step 6: Final answer
   x = 1,126.38