Finding the Fourth Proportional to 5,210.69, 7,816.06 and 1,315.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,210.69 : 7,816.06 = 1,315.10 : x
2. Step 2: Convert to fraction form
   5,210.69/7,816.06 = 1,315.10/x
3. Step 3: Cross multiply
   5,210.69x = 7,816.06 × 1,315.10
4. Step 4: Simplify right side
   5,210.69x = 10,278,916.76
5. Step 5: Solve for x
   x = 10,278,916.76/5,210.69
6. Step 6: Final answer
   x = 1,972.66