Finding the Fourth Proportional to 2,538.48, 3,807.18 and 807.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.48 : 3,807.18 = 807.60 : x
2. Step 2: Convert to fraction form
   2,538.48/3,807.18 = 807.60/x
3. Step 3: Cross multiply
   2,538.48x = 3,807.18 × 807.60
4. Step 4: Simplify right side
   2,538.48x = 3,074,678.57
5. Step 5: Solve for x
   x = 3,074,678.57/2,538.48
6. Step 6: Final answer
   x = 1,211.23