Finding the Fourth Proportional to 1,510.60, 2,082.67 and 978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.60 : 2,082.67 = 978.54 : x
2. Step 2: Convert to fraction form
   1,510.60/2,082.67 = 978.54/x
3. Step 3: Cross multiply
   1,510.60x = 2,082.67 × 978.54
4. Step 4: Simplify right side
   1,510.60x = 2,037,975.90
5. Step 5: Solve for x
   x = 2,037,975.90/1,510.60
6. Step 6: Final answer
   x = 1,349.12