Finding the Fourth Proportional to 7,009.17, 10,513.89 and 1,815

Step by Step Solution

1. Step 1: Write the proportion equation
   7,009.17 : 10,513.89 = 1,815 : x
2. Step 2: Convert to fraction form
   7,009.17/10,513.89 = 1,815/x
3. Step 3: Cross multiply
   7,009.17x = 10,513.89 × 1,815
4. Step 4: Simplify right side
   7,009.17x = 19,082,710.35
5. Step 5: Solve for x
   x = 19,082,710.35/7,009.17
6. Step 6: Final answer
   x = 2,722.53