Finding the Fourth Proportional to 1,510.56, 2,260.71 and 988.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.56 : 2,260.71 = 988.38 : x
2. Step 2: Convert to fraction form
   1,510.56/2,260.71 = 988.38/x
3. Step 3: Cross multiply
   1,510.56x = 2,260.71 × 988.38
4. Step 4: Simplify right side
   1,510.56x = 2,234,440.55
5. Step 5: Solve for x
   x = 2,234,440.55/1,510.56
6. Step 6: Final answer
   x = 1,479.21