Finding the Fourth Proportional to 2,156.31, 2,975.98 and 1,316.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.31 : 2,975.98 = 1,316.84 : x
2. Step 2: Convert to fraction form
   2,156.31/2,975.98 = 1,316.84/x
3. Step 3: Cross multiply
   2,156.31x = 2,975.98 × 1,316.84
4. Step 4: Simplify right side
   2,156.31x = 3,918,871.33
5. Step 5: Solve for x
   x = 3,918,871.33/2,156.31
6. Step 6: Final answer
   x = 1,817.40