Finding the Fourth Proportional to 2,061.88, 3,090.99 and 763.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.88 : 3,090.99 = 763.05 : x
2. Step 2: Convert to fraction form
   2,061.88/3,090.99 = 763.05/x
3. Step 3: Cross multiply
   2,061.88x = 3,090.99 × 763.05
4. Step 4: Simplify right side
   2,061.88x = 2,358,579.92
5. Step 5: Solve for x
   x = 2,358,579.92/2,061.88
6. Step 6: Final answer
   x = 1,143.90