Finding the Fourth Proportional to 13,164.59, 18,167.16 and 7,859.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.59 : 18,167.16 = 7,859.30 : x
2. Step 2: Convert to fraction form
   13,164.59/18,167.16 = 7,859.30/x
3. Step 3: Cross multiply
   13,164.59x = 18,167.16 × 7,859.30
4. Step 4: Simplify right side
   13,164.59x = 142,781,069.75
5. Step 5: Solve for x
   x = 142,781,069.75/13,164.59
6. Step 6: Final answer
   x = 10,845.85