Finding the Fourth Proportional to 13,439.88, 18,545.63 and 7,470.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,439.88 : 18,545.63 = 7,470.59 : x
2. Step 2: Convert to fraction form
   13,439.88/18,545.63 = 7,470.59/x
3. Step 3: Cross multiply
   13,439.88x = 18,545.63 × 7,470.59
4. Step 4: Simplify right side
   13,439.88x = 138,546,667.94
5. Step 5: Solve for x
   x = 138,546,667.94/13,439.88
6. Step 6: Final answer
   x = 10,308.62