Finding the Fourth Proportional to 5,123.57, 7,678.69 and 2,310.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.57 : 7,678.69 = 2,310.34 : x
2. Step 2: Convert to fraction form
   5,123.57/7,678.69 = 2,310.34/x
3. Step 3: Cross multiply
   5,123.57x = 7,678.69 × 2,310.34
4. Step 4: Simplify right side
   5,123.57x = 17,740,384.65
5. Step 5: Solve for x
   x = 17,740,384.65/5,123.57
6. Step 6: Final answer
   x = 3,462.50