Finding the Fourth Proportional to 1,131.57, 1,693.41 and 692.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.57 : 1,693.41 = 692.63 : x
2. Step 2: Convert to fraction form
   1,131.57/1,693.41 = 692.63/x
3. Step 3: Cross multiply
   1,131.57x = 1,693.41 × 692.63
4. Step 4: Simplify right side
   1,131.57x = 1,172,897.09
5. Step 5: Solve for x
   x = 1,172,897.09/1,131.57
6. Step 6: Final answer
   x = 1,036.52