Finding the Fourth Proportional to 2,012.02, 2,777.20 and 1,172.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.02 : 2,777.20 = 1,172.92 : x
2. Step 2: Convert to fraction form
   2,012.02/2,777.20 = 1,172.92/x
3. Step 3: Cross multiply
   2,012.02x = 2,777.20 × 1,172.92
4. Step 4: Simplify right side
   2,012.02x = 3,257,433.42
5. Step 5: Solve for x
   x = 3,257,433.42/2,012.02
6. Step 6: Final answer
   x = 1,618.99