Finding the Fourth Proportional to 8,386.43, 12,574.15 and 4,689.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,386.43 : 12,574.15 = 4,689.05 : x
2. Step 2: Convert to fraction form
   8,386.43/12,574.15 = 4,689.05/x
3. Step 3: Cross multiply
   8,386.43x = 12,574.15 × 4,689.05
4. Step 4: Simplify right side
   8,386.43x = 58,960,837.77
5. Step 5: Solve for x
   x = 58,960,837.77/8,386.43
6. Step 6: Final answer
   x = 7,030.50