Finding the Fourth Proportional to 2,341.19, 3,510.89 and 780.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,341.19 : 3,510.89 = 780.90 : x
2. Step 2: Convert to fraction form
   2,341.19/3,510.89 = 780.90/x
3. Step 3: Cross multiply
   2,341.19x = 3,510.89 × 780.90
4. Step 4: Simplify right side
   2,341.19x = 2,741,654.00
5. Step 5: Solve for x
   x = 2,741,654.00/2,341.19
6. Step 6: Final answer
   x = 1,171.05