Finding the Fourth Proportional to 1,625.99, 2,243.90 and 917.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,625.99 : 2,243.90 = 917.98 : x
2. Step 2: Convert to fraction form
   1,625.99/2,243.90 = 917.98/x
3. Step 3: Cross multiply
   1,625.99x = 2,243.90 × 917.98
4. Step 4: Simplify right side
   1,625.99x = 2,059,839.51
5. Step 5: Solve for x
   x = 2,059,839.51/1,625.99
6. Step 6: Final answer
   x = 1,266.82