Finding the Fourth Proportional to 2,061.70, 3,090.50 and 964.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.70 : 3,090.50 = 964.10 : x
2. Step 2: Convert to fraction form
   2,061.70/3,090.50 = 964.10/x
3. Step 3: Cross multiply
   2,061.70x = 3,090.50 × 964.10
4. Step 4: Simplify right side
   2,061.70x = 2,979,562.99
5. Step 5: Solve for x
   x = 2,979,562.99/2,061.70
6. Step 6: Final answer
   x = 1,445.19