Finding the Fourth Proportional to 13,152.93, 18,151.47 and 7,185.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,152.93 : 18,151.47 = 7,185.15 : x
2. Step 2: Convert to fraction form
   13,152.93/18,151.47 = 7,185.15/x
3. Step 3: Cross multiply
   13,152.93x = 18,151.47 × 7,185.15
4. Step 4: Simplify right side
   13,152.93x = 130,421,034.67
5. Step 5: Solve for x
   x = 130,421,034.67/13,152.93
6. Step 6: Final answer
   x = 9,915.74