Finding the Fourth Proportional to 2,316.30, 3,196.71 and 1,321.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,316.30 : 3,196.71 = 1,321.38 : x
2. Step 2: Convert to fraction form
   2,316.30/3,196.71 = 1,321.38/x
3. Step 3: Cross multiply
   2,316.30x = 3,196.71 × 1,321.38
4. Step 4: Simplify right side
   2,316.30x = 4,224,068.66
5. Step 5: Solve for x
   x = 4,224,068.66/2,316.30
6. Step 6: Final answer
   x = 1,823.63