Finding the Fourth Proportional to 1,227.55, 1,692.85 and 947.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.55 : 1,692.85 = 947.34 : x
2. Step 2: Convert to fraction form
   1,227.55/1,692.85 = 947.34/x
3. Step 3: Cross multiply
   1,227.55x = 1,692.85 × 947.34
4. Step 4: Simplify right side
   1,227.55x = 1,603,704.52
5. Step 5: Solve for x
   x = 1,603,704.52/1,227.55
6. Step 6: Final answer
   x = 1,306.43