Finding the Fourth Proportional to 13,120.67, 18,106.52 and 7,152.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120.67 : 18,106.52 = 7,152.34 : x
2. Step 2: Convert to fraction form
   13,120.67/18,106.52 = 7,152.34/x
3. Step 3: Cross multiply
   13,120.67x = 18,106.52 × 7,152.34
4. Step 4: Simplify right side
   13,120.67x = 129,503,985.12
5. Step 5: Solve for x
   x = 129,503,985.12/13,120.67
6. Step 6: Final answer
   x = 9,870.23