Finding the Fourth Proportional to 13,165.74, 18,165.06 and 7,858.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,165.74 : 18,165.06 = 7,858.62 : x
2. Step 2: Convert to fraction form
   13,165.74/18,165.06 = 7,858.62/x
3. Step 3: Cross multiply
   13,165.74x = 18,165.06 × 7,858.62
4. Step 4: Simplify right side
   13,165.74x = 142,752,303.82
5. Step 5: Solve for x
   x = 142,752,303.82/13,165.74
6. Step 6: Final answer
   x = 10,842.71