Finding the Fourth Proportional to 12,131.46, 18,201.64 and 5,113.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.46 : 18,201.64 = 5,113.24 : x
2. Step 2: Convert to fraction form
   12,131.46/18,201.64 = 5,113.24/x
3. Step 3: Cross multiply
   12,131.46x = 18,201.64 × 5,113.24
4. Step 4: Simplify right side
   12,131.46x = 93,069,353.71
5. Step 5: Solve for x
   x = 93,069,353.71/12,131.46
6. Step 6: Final answer
   x = 7,671.74