Finding the Fourth Proportional to 13,315.69, 18,376.50 and 7,347.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.69 : 18,376.50 = 7,347.34 : x
2. Step 2: Convert to fraction form
   13,315.69/18,376.50 = 7,347.34/x
3. Step 3: Cross multiply
   13,315.69x = 18,376.50 × 7,347.34
4. Step 4: Simplify right side
   13,315.69x = 135,018,393.51
5. Step 5: Solve for x
   x = 135,018,393.51/13,315.69
6. Step 6: Final answer
   x = 10,139.80