Finding the Fourth Proportional to 1,402.56, 2,112.66 and 1,316.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.56 : 2,112.66 = 1,316.16 : x
2. Step 2: Convert to fraction form
   1,402.56/2,112.66 = 1,316.16/x
3. Step 3: Cross multiply
   1,402.56x = 2,112.66 × 1,316.16
4. Step 4: Simplify right side
   1,402.56x = 2,780,598.59
5. Step 5: Solve for x
   x = 2,780,598.59/1,402.56
6. Step 6: Final answer
   x = 1,982.52