Finding the Fourth Proportional to 1,777.20, 2,452.89 and 1,113.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,777.20 : 2,452.89 = 1,113.60 : x
2. Step 2: Convert to fraction form
   1,777.20/2,452.89 = 1,113.60/x
3. Step 3: Cross multiply
   1,777.20x = 2,452.89 × 1,113.60
4. Step 4: Simplify right side
   1,777.20x = 2,731,538.30
5. Step 5: Solve for x
   x = 2,731,538.30/1,777.20
6. Step 6: Final answer
   x = 1,536.99