Finding the Fourth Proportional to 9,123.30, 13,675.91 and 3,859.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.30 : 13,675.91 = 3,859.74 : x
2. Step 2: Convert to fraction form
   9,123.30/13,675.91 = 3,859.74/x
3. Step 3: Cross multiply
   9,123.30x = 13,675.91 × 3,859.74
4. Step 4: Simplify right side
   9,123.30x = 52,785,437.56
5. Step 5: Solve for x
   x = 52,785,437.56/9,123.30
6. Step 6: Final answer
   x = 5,785.78