Finding the Fourth Proportional to 1,131.30, 1,696.41 and 553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.30 : 1,696.41 = 553.50 : x
2. Step 2: Convert to fraction form
   1,131.30/1,696.41 = 553.50/x
3. Step 3: Cross multiply
   1,131.30x = 1,696.41 × 553.50
4. Step 4: Simplify right side
   1,131.30x = 938,962.94
5. Step 5: Solve for x
   x = 938,962.94/1,131.30
6. Step 6: Final answer
   x = 829.99