Finding the Fourth Proportional to 13,307.12, 18,363.57 and 7,339.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.12 : 18,363.57 = 7,339.34 : x
2. Step 2: Convert to fraction form
   13,307.12/18,363.57 = 7,339.34/x
3. Step 3: Cross multiply
   13,307.12x = 18,363.57 × 7,339.34
4. Step 4: Simplify right side
   13,307.12x = 134,776,483.84
5. Step 5: Solve for x
   x = 134,776,483.84/13,307.12
6. Step 6: Final answer
   x = 10,128.15