Finding the Fourth Proportional to 3,511.34, 5,263.23 and 1,780.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,511.34 : 5,263.23 = 1,780.10 : x
2. Step 2: Convert to fraction form
   3,511.34/5,263.23 = 1,780.10/x
3. Step 3: Cross multiply
   3,511.34x = 5,263.23 × 1,780.10
4. Step 4: Simplify right side
   3,511.34x = 9,369,075.72
5. Step 5: Solve for x
   x = 9,369,075.72/3,511.34
6. Step 6: Final answer
   x = 2,668.23