Finding the Fourth Proportional to 1,510.55, 2,264.61 and 1,389.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.55 : 2,264.61 = 1,389.05 : x
2. Step 2: Convert to fraction form
   1,510.55/2,264.61 = 1,389.05/x
3. Step 3: Cross multiply
   1,510.55x = 2,264.61 × 1,389.05
4. Step 4: Simplify right side
   1,510.55x = 3,145,656.52
5. Step 5: Solve for x
   x = 3,145,656.52/1,510.55
6. Step 6: Final answer
   x = 2,082.46