Finding the Fourth Proportional to 1,224, 1,825.20 and 1,134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224 : 1,825.20 = 1,134.72 : x
2. Step 2: Convert to fraction form
   1,224/1,825.20 = 1,134.72/x
3. Step 3: Cross multiply
   1,224x = 1,825.20 × 1,134.72
4. Step 4: Simplify right side
   1,224x = 2,071,090.94
5. Step 5: Solve for x
   x = 2,071,090.94/1,224
6. Step 6: Final answer
   x = 1,692.07