Finding the Fourth Proportional to 2,113.40, 2,914.52 and 1,315.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.40 : 2,914.52 = 1,315.68 : x
2. Step 2: Convert to fraction form
   2,113.40/2,914.52 = 1,315.68/x
3. Step 3: Cross multiply
   2,113.40x = 2,914.52 × 1,315.68
4. Step 4: Simplify right side
   2,113.40x = 3,834,575.67
5. Step 5: Solve for x
   x = 3,834,575.67/2,113.40
6. Step 6: Final answer
   x = 1,814.41