Finding the Fourth Proportional to 2,309.93, 3,188.01 and 1,315.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.93 : 3,188.01 = 1,315.30 : x
2. Step 2: Convert to fraction form
   2,309.93/3,188.01 = 1,315.30/x
3. Step 3: Cross multiply
   2,309.93x = 3,188.01 × 1,315.30
4. Step 4: Simplify right side
   2,309.93x = 4,193,189.55
5. Step 5: Solve for x
   x = 4,193,189.55/2,309.93
6. Step 6: Final answer
   x = 1,815.29