Finding the Fourth Proportional to 2,061.07, 3,091.17 and 761.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.07 : 3,091.17 = 761.65 : x
2. Step 2: Convert to fraction form
   2,061.07/3,091.17 = 761.65/x
3. Step 3: Cross multiply
   2,061.07x = 3,091.17 × 761.65
4. Step 4: Simplify right side
   2,061.07x = 2,354,389.63
5. Step 5: Solve for x
   x = 2,354,389.63/2,061.07
6. Step 6: Final answer
   x = 1,142.31