Finding the Fourth Proportional to 2,520.89, 3,783.63 and 1,289.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.89 : 3,783.63 = 1,289.15 : x
2. Step 2: Convert to fraction form
   2,520.89/3,783.63 = 1,289.15/x
3. Step 3: Cross multiply
   2,520.89x = 3,783.63 × 1,289.15
4. Step 4: Simplify right side
   2,520.89x = 4,877,666.61
5. Step 5: Solve for x
   x = 4,877,666.61/2,520.89
6. Step 6: Final answer
   x = 1,934.90