Finding the Fourth Proportional to 12,111.04, 18,155.20 and 4,720.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.04 : 18,155.20 = 4,720.24 : x
2. Step 2: Convert to fraction form
   12,111.04/18,155.20 = 4,720.24/x
3. Step 3: Cross multiply
   12,111.04x = 18,155.20 × 4,720.24
4. Step 4: Simplify right side
   12,111.04x = 85,696,901.25
5. Step 5: Solve for x
   x = 85,696,901.25/12,111.04
6. Step 6: Final answer
   x = 7,075.93