Finding the Fourth Proportional to 2,316.35, 3,196.31 and 1,321.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,316.35 : 3,196.31 = 1,321.53 : x
2. Step 2: Convert to fraction form
   2,316.35/3,196.31 = 1,321.53/x
3. Step 3: Cross multiply
   2,316.35x = 3,196.31 × 1,321.53
4. Step 4: Simplify right side
   2,316.35x = 4,224,012.95
5. Step 5: Solve for x
   x = 4,224,012.95/2,316.35
6. Step 6: Final answer
   x = 1,823.57