Finding the Fourth Proportional to 1,945.59, 2,681.78 and 1,315.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.59 : 2,681.78 = 1,315.92 : x
2. Step 2: Convert to fraction form
   1,945.59/2,681.78 = 1,315.92/x
3. Step 3: Cross multiply
   1,945.59x = 2,681.78 × 1,315.92
4. Step 4: Simplify right side
   1,945.59x = 3,529,001.36
5. Step 5: Solve for x
   x = 3,529,001.36/1,945.59
6. Step 6: Final answer
   x = 1,813.85