Finding the Fourth Proportional to 13,155.84, 18,155.22 and 7,187.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.84 : 18,155.22 = 7,187.58 : x
2. Step 2: Convert to fraction form
   13,155.84/18,155.22 = 7,187.58/x
3. Step 3: Cross multiply
   13,155.84x = 18,155.22 × 7,187.58
4. Step 4: Simplify right side
   13,155.84x = 130,492,096.17
5. Step 5: Solve for x
   x = 130,492,096.17/13,155.84
6. Step 6: Final answer
   x = 9,918.95