Finding the Fourth Proportional to 1,224.72, 1,686.04 and 1,142.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.72 : 1,686.04 = 1,142.02 : x
2. Step 2: Convert to fraction form
   1,224.72/1,686.04 = 1,142.02/x
3. Step 3: Cross multiply
   1,224.72x = 1,686.04 × 1,142.02
4. Step 4: Simplify right side
   1,224.72x = 1,925,498.61
5. Step 5: Solve for x
   x = 1,925,498.61/1,224.72
6. Step 6: Final answer
   x = 1,572.19