Finding the Fourth Proportional to 13,164.34, 18,164.69 and 7,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.34 : 18,164.69 = 7,499.20 : x
2. Step 2: Convert to fraction form
   13,164.34/18,164.69 = 7,499.20/x
3. Step 3: Cross multiply
   13,164.34x = 18,164.69 × 7,499.20
4. Step 4: Simplify right side
   13,164.34x = 136,220,643.25
5. Step 5: Solve for x
   x = 136,220,643.25/13,164.34
6. Step 6: Final answer
   x = 10,347.70