Finding the Fourth Proportional to 8,665.59, 12,998.93 and 3,470.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,665.59 : 12,998.93 = 3,470.79 : x
2. Step 2: Convert to fraction form
   8,665.59/12,998.93 = 3,470.79/x
3. Step 3: Cross multiply
   8,665.59x = 12,998.93 × 3,470.79
4. Step 4: Simplify right side
   8,665.59x = 45,116,538.90
5. Step 5: Solve for x
   x = 45,116,538.90/8,665.59
6. Step 6: Final answer
   x = 5,206.40