Finding the Fourth Proportional to 1,876.31, 2,586.56 and 1,315.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,876.31 : 2,586.56 = 1,315.08 : x
2. Step 2: Convert to fraction form
   1,876.31/2,586.56 = 1,315.08/x
3. Step 3: Cross multiply
   1,876.31x = 2,586.56 × 1,315.08
4. Step 4: Simplify right side
   1,876.31x = 3,401,526.75
5. Step 5: Solve for x
   x = 3,401,526.75/1,876.31
6. Step 6: Final answer
   x = 1,812.89