Finding the Fourth Proportional to 2,510.90, 3,465.06 and 1,391.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.90 : 3,465.06 = 1,391.86 : x
2. Step 2: Convert to fraction form
   2,510.90/3,465.06 = 1,391.86/x
3. Step 3: Cross multiply
   2,510.90x = 3,465.06 × 1,391.86
4. Step 4: Simplify right side
   2,510.90x = 4,822,861.09
5. Step 5: Solve for x
   x = 4,822,861.09/2,510.90
6. Step 6: Final answer
   x = 1,920.77