Finding the Fourth Proportional to 13,153.74, 18,152.18 and 7,185.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,153.74 : 18,152.18 = 7,185.51 : x
2. Step 2: Convert to fraction form
   13,153.74/18,152.18 = 7,185.51/x
3. Step 3: Cross multiply
   13,153.74x = 18,152.18 × 7,185.51
4. Step 4: Simplify right side
   13,153.74x = 130,432,641.72
5. Step 5: Solve for x
   x = 130,432,641.72/13,153.74
6. Step 6: Final answer
   x = 9,916.01