Finding the Fourth Proportional to 1,038.69, 1,555.20 and 692.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.69 : 1,555.20 = 692.55 : x
2. Step 2: Convert to fraction form
   1,038.69/1,555.20 = 692.55/x
3. Step 3: Cross multiply
   1,038.69x = 1,555.20 × 692.55
4. Step 4: Simplify right side
   1,038.69x = 1,077,053.76
5. Step 5: Solve for x
   x = 1,077,053.76/1,038.69
6. Step 6: Final answer
   x = 1,036.93