Finding the Fourth Proportional to 1,574.76, 2,172.72 and 1,102.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.76 : 2,172.72 = 1,102.12 : x
2. Step 2: Convert to fraction form
   1,574.76/2,172.72 = 1,102.12/x
3. Step 3: Cross multiply
   1,574.76x = 2,172.72 × 1,102.12
4. Step 4: Simplify right side
   1,574.76x = 2,394,598.17
5. Step 5: Solve for x
   x = 2,394,598.17/1,574.76
6. Step 6: Final answer
   x = 1,520.61