Finding the Fourth Proportional to 1,128.56, 1,692.72 and 348.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.56 : 1,692.72 = 348.52 : x
2. Step 2: Convert to fraction form
   1,128.56/1,692.72 = 348.52/x
3. Step 3: Cross multiply
   1,128.56x = 1,692.72 × 348.52
4. Step 4: Simplify right side
   1,128.56x = 589,946.77
5. Step 5: Solve for x
   x = 589,946.77/1,128.56
6. Step 6: Final answer
   x = 522.74