Finding the Fourth Proportional to 1,851.91, 2,776.56 and 926.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.91 : 2,776.56 = 926.81 : x
2. Step 2: Convert to fraction form
   1,851.91/2,776.56 = 926.81/x
3. Step 3: Cross multiply
   1,851.91x = 2,776.56 × 926.81
4. Step 4: Simplify right side
   1,851.91x = 2,573,326.22
5. Step 5: Solve for x
   x = 2,573,326.22/1,851.91
6. Step 6: Final answer
   x = 1,389.55