Finding the Fourth Proportional to 2,340.74, 3,510.72 and 781.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.74 : 3,510.72 = 781.82 : x
2. Step 2: Convert to fraction form
   2,340.74/3,510.72 = 781.82/x
3. Step 3: Cross multiply
   2,340.74x = 3,510.72 × 781.82
4. Step 4: Simplify right side
   2,340.74x = 2,744,751.11
5. Step 5: Solve for x
   x = 2,744,751.11/2,340.74
6. Step 6: Final answer
   x = 1,172.60