Finding the Fourth Proportional to 1,118.10, 1,542.59 and 692.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.10 : 1,542.59 = 692.40 : x
2. Step 2: Convert to fraction form
   1,118.10/1,542.59 = 692.40/x
3. Step 3: Cross multiply
   1,118.10x = 1,542.59 × 692.40
4. Step 4: Simplify right side
   1,118.10x = 1,068,089.45
5. Step 5: Solve for x
   x = 1,068,089.45/1,118.10
6. Step 6: Final answer
   x = 955.27