Finding the Fourth Proportional to 1,945.76, 2,684.72 and 1,316.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.76 : 2,684.72 = 1,316.38 : x
2. Step 2: Convert to fraction form
   1,945.76/2,684.72 = 1,316.38/x
3. Step 3: Cross multiply
   1,945.76x = 2,684.72 × 1,316.38
4. Step 4: Simplify right side
   1,945.76x = 3,534,111.71
5. Step 5: Solve for x
   x = 3,534,111.71/1,945.76
6. Step 6: Final answer
   x = 1,816.31