Finding the Fourth Proportional to 1,510.55, 2,084.52 and 838.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.55 : 2,084.52 = 838.31 : x
2. Step 2: Convert to fraction form
   1,510.55/2,084.52 = 838.31/x
3. Step 3: Cross multiply
   1,510.55x = 2,084.52 × 838.31
4. Step 4: Simplify right side
   1,510.55x = 1,747,469.77
5. Step 5: Solve for x
   x = 1,747,469.77/1,510.55
6. Step 6: Final answer
   x = 1,156.85