Finding the Fourth Proportional to 12,131.90, 18,189.78 and 4,737.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.90 : 18,189.78 = 4,737.04 : x
2. Step 2: Convert to fraction form
   12,131.90/18,189.78 = 4,737.04/x
3. Step 3: Cross multiply
   12,131.90x = 18,189.78 × 4,737.04
4. Step 4: Simplify right side
   12,131.90x = 86,165,715.45
5. Step 5: Solve for x
   x = 86,165,715.45/12,131.90
6. Step 6: Final answer
   x = 7,102.41