Finding the Fourth Proportional to 1,648.86, 2,275.98 and 1,313.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.86 : 2,275.98 = 1,313.40 : x
2. Step 2: Convert to fraction form
   1,648.86/2,275.98 = 1,313.40/x
3. Step 3: Cross multiply
   1,648.86x = 2,275.98 × 1,313.40
4. Step 4: Simplify right side
   1,648.86x = 2,989,272.13
5. Step 5: Solve for x
   x = 2,989,272.13/1,648.86
6. Step 6: Final answer
   x = 1,812.93