Finding the Fourth Proportional to 13,156.04, 18,155.58 and 7,187.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,156.04 : 18,155.58 = 7,187.96 : x
2. Step 2: Convert to fraction form
   13,156.04/18,155.58 = 7,187.96/x
3. Step 3: Cross multiply
   13,156.04x = 18,155.58 × 7,187.96
4. Step 4: Simplify right side
   13,156.04x = 130,501,601.25
5. Step 5: Solve for x
   x = 130,501,601.25/13,156.04
6. Step 6: Final answer
   x = 9,919.52