Finding the Fourth Proportional to 2,459.02, 3,688.14 and 815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.02 : 3,688.14 = 815.50 : x
2. Step 2: Convert to fraction form
   2,459.02/3,688.14 = 815.50/x
3. Step 3: Cross multiply
   2,459.02x = 3,688.14 × 815.50
4. Step 4: Simplify right side
   2,459.02x = 3,007,678.17
5. Step 5: Solve for x
   x = 3,007,678.17/2,459.02
6. Step 6: Final answer
   x = 1,223.12